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O-Rings

O-rings are indispensable sealing components that offer reliable and leakage of fluids or gases across a wide range of applications. They find extensive use in diverse industries, including automotive, manufacturing, oil and gas, food and pharmaceuticals, etc. When choosing an O-ring, it's crucial to consider factors

O-rings are indispensable sealing components that offer reliable and leakage of fluids or gases across a wide range of applications. They find extensive use in diverse industries, including automotive, manufacturing, oil and gas, food and pharmaceuticals, etc. When choosing an O-ring, it's crucial to consider factors such as inner diameter, thickness or wire diameter, materials, for example, Nitrile Rubber, Silicon Rubber, Fluoro Rubber, etc. and operating environments such as Heat Resistant, Chemical Resistant, and so on. To ensure top-quality products, trusted brands like MISUMI, ESCO, NOK, and RS Pro are highly recommended.
Enjoy the convenience of FREE SHIPPING and NO MINIMUM ORDER on O Ring and related products, for example, O Ring gauge, O Ring Cord, and Back Up Ring. If you have any doubts or need assistance in selecting the right product, our experts are ready to provide advice and guidance.

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    O Rings GB Standards
    O Rings GB Standards
    O Rings GB Standards
    O Rings GB Standards
    O Rings GB Standards
    O Rings GB Standards
    O Rings GB Standards
    O Rings GB Standards
    O Rings GB Standards

    Recommended

    MiSUMi Economy
    82

    O Rings GB Standards【2-100 Pieces Per Package】

    MiSUMi Economy
    82

    MISUMI

    O Rings GB StandardsThese O Rings are an economy item, The price is cheaper than the MISUMI standard product.They offer a wide variety of sizes to choose from.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 1.8 to 250● Thickness Minimum/ Maximum (mm.) : 1.8 to 7● Material : Nitrile Rubber (Black) or Fluoro Rubber (Brown)● Operating Temperature Range (℃)Nitrile Rubber : -20 to 100Fluoro Rubber : -10 to 200[Applicatio...Readmore

    • Volume Discount
    CAD :
    2D / 3D
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    1.8 ~ 250 1.8 ~ 7 - Nitrile Rubber / Fluoro Rubber -
    Recommended
    From: 46,106 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Rings/P Series
    • On Sale Till 31/03/2025
    O-Rings/P Series
    O-Rings/P Series
    O-Rings/P Series
    O-Rings/P Series
    O-Rings/P Series
    O-Rings/P Series
    O-Rings/P Series
    O-Rings/P Series
    Sale

    O-Rings/P Series

    MISUMI

    O-Rings/P SeriesThe O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 2.8 to 79.6● Thickness (mm.) : 1.9, 2, 2.4, 3, 3.5 and 5.7● Material and Operating Temperature Range (℃)Nitrile Rubber -> -30 to 100 ℃Silicone Rubber -> -50 to 200 ℃Fluoro Rubber -> -15 to 200 ℃Ethylene Propylene Rubber -> -45 to 130 ℃...Readmore

    • Volume Discount
    CAD :
    2D / 3D
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.8 ~ 79.6 1.9 ~ 5.7 P (For Mounting, Dynamic) Nitrile Rubber / Ethylene Propylene Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Heat Resistant / Abrasion Resistant / Pressure Resistant / Chemical Resistant / Weather Resistant / Cold Resistant
    From: 597 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring - JIS B 2401 - P Series (Static/Dynamic application)
    • On Sale Till 31/03/2025
    Sale

    O-Ring - JIS B 2401 - P Series (Static/Dynamic application)【1-10 Pieces Per Package】

    NOK

    NOK's new JIS-compliant O-ring.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.8 ~ 499.5 1.9 ~ 8.4 P (For Mounting, Dynamic) Nitrile Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Heat Resistant / Abrasion Resistant / Pressure Resistant / Chemical Resistant / Cold Resistant
    From: 1,980 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring, ISO Equivalent General Industrial Use Series (Static application)
    • On Sale Till 31/03/2025
    Sale

    O-Ring, ISO Equivalent General Industrial Use Series (Static application)

    NOK

    O-Ring, ISO Equivalent General Industrial Use Series (Static application)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 1.8 to 670● Thickness (mm.) : 1.8, 2.65, 3.55, 5.3 and 7● Material :JIS symbol : NBR-70-1Old JIS symbol : Class 1ANOK symbol : A305[Application]O-rings are utilized across multiple industries ...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    1.8 ~ 670 1.8 ~ 7 ISO (for general industrial applications) Nitrile Rubber Mineral Oil Resistant
    From: 8,860 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O Ring-P Type

    O Ring-P Type

    HANSUNGTECH

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    3 ~ 500 - P (For Mounting, Dynamic) - -
    Days to Ship: Số ngày giao hàng: 8 Day(s) or more
    day to ship 8 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Rings/S Series
    • On Sale Till 31/03/2025
    O-Rings/S Series
    O-Rings/S Series
    O-Rings/S Series
    Sale

    O-Rings/S Series

    MISUMI

    O-Rings/S SeriesThe O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 2.5 to 49.5● Thickness (mm.) : 1.5 and 2● Material and Operating Temperature Range (℃)Nitrile Rubber -> -30 to 100 ℃Silicone Rubber -> -50 to 200 ℃Fluoro Rubber -> -15 to 200 ℃[Application]O-rings are utilized across multiple industries to pre...Readmore

    • Volume Discount
    CAD :
    2D / 3D
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.5 ~ 49.5 1.5 ~ 2 S (for Low Voltage Mounting) Nitrile Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Heat Resistant / Abrasion Resistant / Chemical Resistant / Cold Resistant
    From: 891 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O Ring-AS568 Type

    O Ring-AS568 Type

    HANSUNGTECH

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    0.74 ~ 494.16 - - - -
    Days to Ship: Số ngày giao hàng: 8 Day(s) or more
    day to ship 8 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring JIS B 2401 - G Series (Static application)
    • On Sale Till 31/03/2025
    Sale

    O-Ring JIS B 2401 - G Series (Static application)

    NOK

    O-Ring JIS B 2401 - G Series (Static application)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 24.4 to 499.3● Thickness (mm.) : 3.1 and 5.7● Applications Environment : Heat Resistant or Mineral Oil Resistant● Material : Nitrile Rubber, Silicone Rubber and Fluoro Rubber[Application]O-rings are utilized across m...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    24.4 ~ 499.3 3.1 ~ 5.7 G (For Mounting) Nitrile Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Heat Resistant
    From: 15,908 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O Ring-G Type

    O Ring-G Type

    HANSUNGTECH

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    25 ~ 500 - G (For Mounting) - -
    Days to Ship: Số ngày giao hàng: 8 Day(s) or more
    day to ship 8 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring NOK S Series (Static application)
    • On Sale Till 31/03/2025
    Sale

    O-Ring NOK S Series (Static application)

    NOK

    O-Ring NOK S Series (Static application)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 2.5 to 149.5● Thickness (mm.) : 1.5 and 2● Applications Environment : Heat Resistant or Mineral Oil Resistant● Material (NOK Number) :Nitrile Rubber (A305)Fluoro Rubber (F201)[Application]O-rings are utilized across multiple i...Readmore

    • Volume Discount
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.5 ~ 149.5 1.5 ~ 2 S (for Low Voltage Mounting) Nitrile Rubber / Fluoro Rubber Mineral Oil Resistant / Heat Resistant
    From: 2,280 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring (Packing and Gasket) AS568 (ARP568)
    O-Ring (Packing and Gasket) AS568 (ARP568)
    O-Ring (Packing and Gasket) AS568 (ARP568)
    O-Ring (Packing and Gasket) AS568 (ARP568)
    O-Ring (Packing and Gasket) AS568 (ARP568)
    O-Ring (Packing and Gasket) AS568 (ARP568)

    O-Ring (Packing and Gasket) AS568 (ARP568)

    MUSASHI OILSEAL

    We offer a wide selection of sizes and materials for AS model O-rings[Features]· Although the O-ring is simple in structure, the self-sealing effect is good.· Exhibits stable sealing performance at high pressures.· There are plenty of different types and sizes available at low prices.· Easy to install and requires only a small space.· There is no fixed seal orientation, which enables seals to made from both sides.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    1.07 ~ 658.88 1.27 ~ 6.98 AS (For Mounting) Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 8,083 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring P for Motion and Fixing

    O-Ring P for Motion and Fixing

    MUSASHI OILSEAL

    A JIS B 2401 standard compliant P O-ring.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    1.8 ~ 939.5 1.9 ~ 8.4 P (For Mounting, Dynamic) Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 8,083 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Rings/G Series
    • On Sale Till 31/03/2025
    O-Rings/G Series
    O-Rings/G Series
    O-Rings/G Series
    Sale

    O-Rings/G Series

    MISUMI

    O-Rings/G SeriesThe O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 24.4 to 169.3● Thickness (mm.) : 3.1 and 5.7● Material and Operating Temperature Range (℃)Nitrile Rubber -> -30 to 100 ℃Silicone Rubber -> -50 to 200 ℃Fluoro Rubber -> -15 to 200 ℃[Application]O-rings are utilized across multiple indust...Readmore

    • Volume Discount
    CAD :
    2D / 3D
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    24.4 ~ 169.3 3.1 ~ 5.7 G (For Mounting) Nitrile Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Heat Resistant / Abrasion Resistant / Pressure Resistant / Chemical Resistant
    From: 13,762 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O Ring-S Type

    O Ring-S Type

    HANSUNGTECH

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    3 ~ 300 - S (for Low Voltage Mounting) - -
    Days to Ship: Số ngày giao hàng: 7 Day(s) or more
    day to ship 7 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Rings/Large Diameter

    O-Rings/Large Diameter

    MISUMI

    O-Rings/Large DiameterThe O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter (mm.) : The size is configurable between 160 to 200 mm, and the minimum length can be increased by increments 1 mm.● Thickness Minimum/ Maximum (mm.) : 3.1 to 20● Material and Operating Temperature Range (℃)Nitrile Rubber -> -30 to 100 ℃Fluoro Rub...Readmore

    CAD :
    2D / 3D
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    160 ~ 2000 3.1 ~ 20 Configurable Nitrile Rubber / Fluoro Rubber -
    Days to Ship: Số ngày giao hàng: 11 Day(s) or more
    day to ship 11 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring G, for Mounting
    O-Ring G, for Mounting
    O-Ring G, for Mounting

    O-Ring G, for Mounting

    MUSASHI OILSEAL

    G-type O-ring that complies with JIS B 2401 standards[Features]· Although the O-ring is simple in structure, it features excellent self-sealing.· Exhibits stable sealing performance under high pressures.· A wide variety of different types and sizes are available at low prices.· Easy to install and requires only a small space.· No fixed seal orientation, which permits sealing from both sides.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.4 ~ 899.3 3.1 ~ 5.7 G (For Mounting) Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 10,473 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Rings/P Series/Chemical/Heat Resistant
    • On Sale Till 31/03/2025
    O-Rings/P Series/Chemical/Heat Resistant
    O-Rings/P Series/Chemical/Heat Resistant
    Sale

    O-Rings/P Series/Chemical/Heat Resistant

    MISUMI

    O-Rings/P Series/Chemical/Heat ResistantThe O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 2.8 to 29.7● Thickness (mm.) : 1.9, 2.4 and 3.5● Material : Perfluoro Rubber● Max Operating Temperature Range (℃) / PropertiesMPPEM -> 260 ℃ / Chemical ResistantMPPEJ -> 320 ℃ / Special Heat Resistant[Application]O-...Readmore

    • Volume Discount
    CAD :
    2D / 3D
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.8 ~ 29.7 1.9 ~ 3.5 P (For Mounting, Dynamic) Fluoro Rubber Heat Resistant / Chemical Resistant
    From: 239,130 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring NOK Iron Rubber P Series (Static/Dynamic application)

    O-Ring NOK Iron Rubber P Series (Static/Dynamic application)

    NOK

    O-Ring NOK Iron Rubber P Series (Static/Dynamic application)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 2.8 to 49.7● Thickness (mm.) : 1.9, 2.4 and 3.5● Operating Temperature Range (℃) : -35 to 80● Applications Environment : Excellent abrasion resistance.● Material: Urethane RubberNOK symbol : U8...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.8 ~ 49.7 1.9 ~ 3.5 P (For Mounting, Dynamic) Urethane Rubber Pressure Resistant
    From: 23,671 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring NOK SS Series (Static application)
    • On Sale Till 31/03/2025
    Sale

    O-Ring NOK SS Series (Static application)

    NOK

    O-Ring NOK SS Series (Static application)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 1.8 to 11.5● Thickness (mm.) : 1● Applications Environment : Heat Resistant or Mineral Oil Resistant● Material (NOK Number) :Nitrile Rubber (A305)Fluoro Rubber (F201)[Application]O-rings are utilized across multiple ind...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    1.8 ~ 11.5 1 SS (for Low Voltage Mounting) Nitrile Rubber / Fluoro Rubber Mineral Oil Resistant / Heat Resistant
    From: 6,400 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Rings/V Series/AS Series
    • On Sale Till 31/03/2025
    O-Rings/V Series/AS Series
    O-Rings/V Series/AS Series
    Sale

    O-Rings/V Series/AS Series

    MISUMI

    O-Rings/V Series/AS SeriesThe O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 0.14 to 173● Thickness (mm.) : 1.02, 1.27, 1.52, 1.78 and 4● Applications Environment : Heat Resistant or Mineral Oil Resistant● Material and Operating Temperature Range (℃)Nitrile Rubber -> -30 to 100 ℃Fluoro Rubber -> -15 to 20...Readmore

    • Volume Discount
    CAD :
    2D / 3D
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    0.74 ~ 173 1.02 ~ 4 V (For Vacuum Flanges) / AS (For Mounting) Nitrile Rubber / Fluoro Rubber Mineral Oil Resistant / Heat Resistant
    From: 10,634 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    Backup Ring-For G O-Ring-BUR-G Type

    Backup Ring-For G O-Ring-BUR-G Type

    HANSUNGTECH

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    20 ~ 410 - Back-Up Ring - -
    From: 253,792 VND
    Days to Ship: Số ngày giao hàng: 8 Day(s)
    day to ship 8 Day(s)
  • You can add up to 6 items per a category to the compare list.

    JIS B 2401-1 P (for Motion, Cylindrical Surface Mount and Flat Surface Mount)

    JIS B 2401-1 P (for Motion, Cylindrical Surface Mount and Flat Surface Mount)

    MORISEI

    This O-ring can be used for dynamic applications and for cylindrical/flat surface mount.The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 1.8 to 554.5● Thickness (mm.) : 1.9, 2.4, 3.5, 5.7 and 8.4● Material CodeNitrile Rubber : NBR-90 (Class 1 B) or NBR-70-1 (Class 1 A) or NBR-70-2 (Class 2)Silicon Rubber : VMQ-70 ...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    1.8 ~ 554.5 1.9 ~ 8.4 P (For Mounting, Dynamic) Nitrile Rubber / Ethylene Propylene Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Gasoline Resistant / Animal and Vegetable Oil Resistant / Heat Resistant / Coolant Resistant / Abrasion Resistant / Pressure Resistant / Cold Resistant / Water Resistant / Hot Water-resistant
    From: 2,500 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring P Series
    O-Ring P Series
    O-Ring P Series

    O-Ring P Series【200 Pieces Per Package】

    MISUMI

    O-Ring P SeriesThe O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 2.8 to 49.7● Thickness (mm.) : 1.9, 2.4, 3.5 and 5.7● Applications Environment : Mineral Oil Resistant● Material : Nitrile Rubber● Operable Temperature Range (°C) : -30 to 100°C[Application]O-rings are utilized across multiple industries to prev...Readmore

    • Volume Discount
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    49.7 5.7 P (For Mounting, Dynamic) Nitrile Rubber Mineral Oil Resistant
    From: 1,876,705 VND
    Days to Ship: Số ngày giao hàng: 6 Day(s)
    day to ship 6 Day(s)
  • You can add up to 6 items per a category to the compare list.

    O-Ring SS Standard
    • On Sale Till 31/03/2025
    O-Ring SS Standard
    O-Ring SS Standard
    Sale

    O-Ring SS Standard

    MUSASHI OILSEAL

    An O ring with a wire diameter of 1 mm.[Features]· Although the O-ring is simple in structure, the self-sealing effect is good.· Exhibits a stable sealing performance within high pressure.· There are plenty of different types and sizes available at low prices.· Easy to install and requires little space.· There is no fixed seal orientation, which enables seals to made from both sides.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    0.5 ~ 20 1 SS (for Low Voltage Mounting) Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 10,473 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring JIS B 2401 - V Series (Vacuum flange application)

    O-Ring JIS B 2401 - V Series (Vacuum flange application)

    NOK

    O-Ring JIS B 2401 - V Series (Vacuum flange application)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 14.5 to 1044● Thickness (mm.) : 4, 6 and 10● Applications Environment : Heat Resistant or Mineral Oil Resistant● Material : Nitrile Rubber or Fluoro Rubber[Application]O-rings are utilized across multi...Readmore

    • Volume Discount
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    14.5 ~ 1044 4 ~ 10 V (For Vacuum Flanges) Nitrile Rubber / Fluoro Rubber Mineral Oil Resistant / Heat Resistant
    From: 25,566 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    S (for Cylindrical Surface Fixing and Flat Surface Mounting)

    S (for Cylindrical Surface Fixing and Flat Surface Mounting)

    MORISEI

    O-Ring (for Cylindrical Surface Fixing and Flat Surface Mounting)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 2.5 to 209.5● Thickness (mm.) : 1.5 and 2● Material CodeNitrile Rubber : NBR-90 (Class 1 B), NBR-70-1 (Class 1 A) or NBR-70-2 (Class 2)Silicon Rubber : VMQ-70 (Class 4 D)Ethylene Propylene Ru...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.5 ~ 299.5 1.5 ~ 2 S (for Low Voltage Mounting) Nitrile Rubber / Ethylene Propylene Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Gasoline Resistant / Animal and Vegetable Oil Resistant / Heat Resistant / Coolant Resistant / Abrasion Resistant / Pressure Resistant / Cold Resistant / Water Resistant / Hot Water-resistant
    From: 6,760 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring V Vacuum Flange
    O-Ring V Vacuum Flange
    O-Ring V Vacuum Flange

    O-Ring V Vacuum Flange

    MUSASHI OILSEAL

    This is an O-ring for vacuum flanges.[Features]· Although the O-ring is simple in structure, the self-sealing effect is good.· Exhibits a stable sealing performance within high pressure.· There are plenty of different types and sizes available at low prices.· Easy to install and requires little space.· There is no fixed seal orientation, which enables seals to made from both sides.

    • Volume Discount
    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    9.5 ~ 960.5 4 ~ 10 V (For Vacuum Flanges) Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 12,068 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring Gasket for O-Ring AN-6230 Aircraft (Hydraulic)

    O-Ring Gasket for O-Ring AN-6230 Aircraft (Hydraulic)

    MUSASHI OILSEAL

    O-ring Gasket for Aircraft.[Features]· Although the O-ring is simple in structure, the self-sealing effect is good.· Exhibits a stable sealing performance within high pressure.· There are plenty of different types and sizes available at low prices.· Easy to install and requires little space.· There is no fixed seal orientation, which enables seals to made from both sides.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    40.87 ~ 228.19 3.53 Others Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 16,848 VND
    Days to Ship: Số ngày giao hàng: 8 Day(s) or more
    day to ship 8 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring BR Backup Ring (Polytetrafluoroethylene Resin) JIS-B-2407
    O-Ring BR Backup Ring (Polytetrafluoroethylene Resin) JIS-B-2407
    O-Ring BR Backup Ring (Polytetrafluoroethylene Resin) JIS-B-2407

    O-Ring BR Backup Ring (Polytetrafluoroethylene Resin) JIS-B-2407

    MUSASHI OILSEAL

    A backup ring made of polytetrafluoro ethylene plastic.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    3 ~ 150 1.5 ~ 5 Back-Up Ring - -
    From: 11,213 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    Backup Ring-For P-O Ring-BUR-P Type

    Backup Ring-For P-O Ring-BUR-P Type

    HANSUNGTECH

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    3 ~ 400 - Back-Up Ring - -
    From: 236,589 VND
    Days to Ship: Số ngày giao hàng: 8 Day(s) or more
    day to ship 8 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring AN-6227 Aircraft O-Ring Packing (Hydraulic)

    O-Ring AN-6227 Aircraft O-Ring Packing (Hydraulic)

    MUSASHI OILSEAL

    O-ring gasket for aircraft.[Features]· Although the O-ring is simple in structure, the self-sealing effect is good.· Exhibits a stable sealing performance under high pressure.· There are plenty of different types and sizes available at low prices.· Easy to install and requires only a small space.· There is no fixed seal orientation, which enables seals to made from both sides.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.9 ~ 393.06 1.78 ~ 6.98 Others Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 8,083 VND
    Days to Ship: Số ngày giao hàng: 9 Day(s) or more
    day to ship 9 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    Class 1-A, NBR 70° O-Ring
    Class 1-A, NBR 70° O-Ring
    Class 1-A, NBR 70° O-Ring

    Class 1-A, NBR 70° O-Ring【1-10 Pieces Per Package】

    AKITSU INDUSTRY

    Class 1-A, NBR 70° O-RingThe O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 2.8 to 149.6● Thickness (mm.) : 1.9, 2.4, 3.5 and 5.7● Applications Environment : Mineral Oil Resistant● Material : Nitrile Rubber (NBR)[Application]O-rings are utilized across multiple industries to prevent the leakage of fluids or gases ...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    3.8 ~ 149.6 1.9 ~ 5.7 Others Nitrile Rubber Mineral Oil Resistant
    From: 161,224 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    JIS B 2401-1 G (for Mounting Cylindrical/Flat Surfaces)

    JIS B 2401-1 G (for Mounting Cylindrical/Flat Surfaces)

    MORISEI

    JIS B 2401-1 G (for Mounting Cylindrical/Flat Surfaces)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 24.4 to 599.3● Thickness (mm.) : 3.1 and 5.7● Material CodeNitrile Rubber : NBR-90 (Class 1 B) or NBR-70-1 (Class 1 A)Silicon Rubber : VMQ-70 (Class 4 D)Ethylene Propylene Rubber : EPDM-70Fluoro Rubber : ...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    24.4 ~ 599.3 3.1 ~ 5.7 G (For Mounting) Nitrile Rubber / Ethylene Propylene Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Gasoline Resistant / Animal and Vegetable Oil Resistant / Heat Resistant / Coolant Resistant / Abrasion Resistant / Pressure Resistant / Cold Resistant / Water Resistant / Hot Water-resistant
    From: 9,595 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    JIS B 2401-1 V (for Vacuum Flanges)

    JIS B 2401-1 V (for Vacuum Flanges)

    MORISEI

    O-Ring JIS B 2401-1 V (for Vacuum Flanges)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 11.5 to 940.5● Thickness (mm.) : 4, 6 and 10● Material CodeNitrile Rubber : NBR-90 (Class 1 B) or NBR-70-1 (Class 1 A)Silicon Rubber : VMQ-70 (Class 4 D)Ethylene Propylene Rubber : EPDM-70Fluoro Rubber : FKM-90 or FK...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    11.5 ~ 940.5 4 ~ 10 V (For Vacuum Flanges) Nitrile Rubber / Ethylene Propylene Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Gasoline Resistant / Animal and Vegetable Oil Resistant / Heat Resistant / Coolant Resistant / Abrasion Resistant / Pressure Resistant / Cold Resistant / Water Resistant / Hot Water-resistant
    From: 11,643 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring SO for Fixing

    O-Ring SO for Fixing

    MUSASHI OILSEAL

    The O-ring is for cylindrical surfaces and plane fixing.[Features]· Although the O-ring is simple in structure, the self-sealing effect is good.· Exhibits a stable sealing performance within high pressure.· There are plenty of different types and sizes available at low prices.· Easy to install and requires little space.· There is no fixed seal orientation, which enables seals to made from both sides.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    2.5 ~ 299.5 1.5 ~ 2 Others Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 9,676 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    JISB2407 Equivalent Back-Up Ring
    • On Sale Till 31/03/2025
    Sale

    JISB2407 Equivalent Back-Up Ring

    NOK

    JISB2407 Equivalent Back-Up RingA back-up ring is a component used in conjunction with an O-ring to provide enhanced sealing performance in certain applications[Feature]● Applicable O-ring JIS B 2401 Number Dimension : P3 to P165 and G30 to P180● Inner Diameter Minimum/ Maximum (mm.) : 3 to 180● Outer Diameter Minimum/ Maximum (mm.) : 6 to 190● Shape : Bias cut and Endless● Material : Rareflon (PTFE)[Application]The purp...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    - - Back-Up Ring - -
    From: 19,106 VND
    Special Price
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring, GS, for Fixing

    O-Ring, GS, for Fixing

    MUSASHI OILSEAL

    An O-ring for cylindrical surface retention.[Features]· Although the O-ring is simple in structure, its self-sealing effect is excellent.· Exhibits a stable sealing performance, even at high pressures.· A variety of types and sizes are available at low prices.· A compact type for easy installation.· The seal has no fixed direction, allowing it to be sealed from both sides.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    149.3 ~ 379.3 3.1 G (For Mounting) Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 68,716 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    Large bore O-Ring

    Large bore O-Ring

    tagami seal

    [Features]・ Materials: The manufacturer offers 6?types of rubber: nitrile rubber, fluoroelastomer, ternary fluoroelastomer, ethylene propylene rubber, chloroprene rubber, and silicone rubber・ Hardness: You can choose from 50, 60, 70, 80, 90 (*)・ Line width: Available from 3.1?mm to 40?mm・ Inner diameter: It can be specified in 1?mm increments from 160?mm to 4,000?mm (*)* Some materials are excluded

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    160 ~ 4000 3.1 ~ 40 Configurable Nitrile Rubber / Ethylene Propylene Rubber / Fluoro Rubber Mineral Oil Resistant / Gasoline Resistant / Heat Resistant / Chemical Resistant
    Days to Ship: Số ngày giao hàng: 13 Day(s) or more
    day to ship 13 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring JASO F404 3000s (for Motion/Fixing)

    O-Ring JASO F404 3000s (for Motion/Fixing)

    MUSASHI OILSEAL

    An O-ring that complies with Japanese Automotive Standards Organization Standard JASO F 404 3000[Features]· Although the O-ring is simple in structure, it features excellent self-sealing.· Exhibits stable sealing performance under high pressures.· A wide variety of different types and sizes are available at low prices.· Easy to install and requires only a small space.· No fixed seal orientation, which permits sealing from both sides.

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    31.2 ~ 134.4 3.1 ~ 3.5 JASO (For Mounting, Dynamic) Nitrile Rubber / Silicon Rubber / Fluoro Rubber -
    From: 17,246 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    AS568 [Old: ARP568] (for O-Ring Hydraulic)

    AS568 [Old: ARP568] (for O-Ring Hydraulic)

    MORISEI

    AS568 [Old: ARP568] (for O-Ring Hydraulic)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 0.74 to 532.26● Thickness Minimum/ Maximum (mm.) : 1.02 to 6.98● Material CodeNitrile Rubber : NBR-90 (Class 1 B) or NBR-70-1 (Class 1 A)Silicon Rubber : VMQ-70 (Class 4 D)Ethylene Propylene Rubber : EPDM-70Fluo...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    0.74 ~ 532.26 1.02 ~ 6.98 AS (For Mounting) Nitrile Rubber / Ethylene Propylene Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Gasoline Resistant / Animal and Vegetable Oil Resistant / Heat Resistant / Coolant Resistant / Abrasion Resistant / Pressure Resistant / Cold Resistant / Water Resistant / Hot Water-resistant
    From: 7,208 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring JASO F404 1000s (for Motion/Fixing)

    O-Ring JASO F404 1000s (for Motion/Fixing)

    MUSASHI OILSEAL

    O-Ring JASO F404 1000s (for Motion/Fixing)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter (mm.) : 11 to 16.8● Thickness (mm.) : 1.9● Material : Fluoro Rubber● Type of Material : Class 4 D[Application]O-rings are utilized across multiple industries to prevent the leakage of fluids or gases for Japanese Automotive Standards Organization

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    11 ~ 16.8 1.9 JASO (For Mounting, Dynamic) Fluoro Rubber -
    From: 20,036 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    JASO F404 (for Motion, Cylindrical Surface Fixing and Flat Surface Mount)

    JASO F404 (for Motion, Cylindrical Surface Fixing and Flat Surface Mount)

    MORISEI

    JASO F404 (for Motion, Cylindrical Surface Fixing and Flat Surface Mount)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 11 to 149.6● Thickness (mm.) : 1.9, 2.4 and 3.5● Material CodeNitrile Rubber : NBR-90 (Class 1 B) or NBR-70-1 (Class 1 A)Silicon Rubber : VMQ-70 (Class 4 D)Ethylene Propylene Rubber : EPD...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    11 ~ 149.6 1.9 ~ 3.5 JASO (For Mounting, Dynamic) Nitrile Rubber / Ethylene Propylene Rubber / Silicon Rubber / Fluoro Rubber Mineral Oil Resistant / Gasoline Resistant / Animal and Vegetable Oil Resistant / Heat Resistant / Coolant Resistant / Abrasion Resistant / Pressure Resistant / Cold Resistant / Water Resistant / Hot Water-resistant
    From: 10,080 VND
    Days to Ship: Số ngày giao hàng: 4 Day(s) or more
    day to ship 4 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring NOK Iron Rubber G Series (Static/Dynamic application)

    O-Ring NOK Iron Rubber G Series (Static/Dynamic application)

    NOK

    O-Ring NOK Iron Rubber G Series (Static/Dynamic application)The O Ring is a commonly employed sealing component found in automation machines across a wide range of industries.[Feature]● Inner Diameter Minimum/ Maximum (mm.) : 24.4 to 49.4● Thickness (mm.) : 3.1● Operating Temperature Range (℃) : -35 to 80● Applications Environment : Excellent abrasion resistance.● Material: Urethane RubberNOK symbol : U565 and U801[...Readmore

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    24.4 ~ 49.4 3.1 G (For Mounting) Urethane Rubber Pressure Resistant
    From: 45,583 VND
    Days to Ship: Số ngày giao hàng: 8 Day(s) or more
    day to ship 8 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    O-Ring (For High Pressure)

    O-Ring (For High Pressure)【10 Pieces Per Package】

    ESCO

    ESCO O-ring (for high pressure). [Materials]·Nitrile rubber

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    - - P (For Mounting, Dynamic) Nitrile Rubber Mineral Oil Resistant / Animal and Vegetable Oil Resistant / Pressure Resistant
    From: 113,114 VND
    Days to Ship: Số ngày giao hàng: 6 Day(s) or more
    day to ship 6 Day(s) or more
  • You can add up to 6 items per a category to the compare list.

    Backup Ring (5 Pcs.)

    Backup Ring (5 Pcs.)【5 Pieces Per Package】

    ESCO

    Backup Ring EA423RD-10AA back-up ring is a component used in conjunction with an O-ring to provide enhanced sealing performance in certain applications[Feature]● Applicable O-ring JIS Number : P-10A● Inner Diameter (mm.) : 9.8● Thickness (mm.) : 2.4● Shape : Spiral● Material : Teflon(R)[Application]These back-up rings are used to prevent extrusion or deformation of the O-ring under high pressure or dynamic conditions

    Inner Dia. d(Ø) Wire Dia. W(mm) Type Material Environment, Applications
    - - P (For Mounting, Dynamic) Fluoro Rubber -
    From: 144,921 VND
    Days to Ship: Số ngày giao hàng: Same day or more
    day to ship Same day or more

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FAQ O-Ring

Question: What are the main applications of O-rings?
Answer: O-rings have several key applications across various industries. Here are their main uses:
1. Hydraulics and Pneumatics: O-rings find extensive use in hydraulic and pneumatic systems. They seal fittings, connectors, and control valves, maintaining pressure integrity and preventing leaks in these systems.
2. Automotive Industry: O-rings play a crucial role in automotive applications, including engines, fuel systems, brake systems, and air conditioning systems. They provide effective sealing to prevent fluid leaks,
leaks.
3. Industrial Machinery: O-rings are widely utilized in manufacturing and machinery, such as pumps, compressors, valves, and cylinders. They seal these components, preventing leakage and ensuring efficient operation.
4. Medical Equipment: O-rings are utilized in medical devices like syringes, catheters, and pumps.
5. Plumbing and Water Systems: O-rings are commonly found in plumbing fittings, faucets, and valves.
Question: How do I select the right O-ring size for my application?
Answer: To select the right O-ring size for your application, you need to consider the following factors:
1. Inner Diameter (ID) and Outer Diameter (OD): The ID of the O-ring should match the groove diameter, and the OD should be slightly larger to ensure proper sealing.
2. Cross-Sectional Diameter or thickness of O-ring : It should be compatible with the groove's width or depth to provide an adequate seal.
3. Material : Consider the material of the O-ring to ensure compatibility with the fluid or gas in your application. Different materials have varying chemical resistance, temperature tolerance, and physical properties.
4. Compression and Stretch: Determine the compression and stretch limits of the O-ring material to ensure it can adequately seal the mating surfaces without being overcompressed or overstretched.
5. Standards and Guidelines: Consult industry standards, such as AS568 (for inch sizes) or ISO 3601 (for metric sizes), to understand the standard sizes available and their corresponding tolerances.
6. Consider O-ring Sizing Guides: O-ring manufacturers often provide sizing guides or calculators that help select the appropriate O-ring size based on application parameters.
Question: Is an O-ring a gasket? Can I replace O-ring with gasket?
Answer: Yes, an O-ring is a type of gasket.
Yes with condition, an O-ring can be considered a type of gasket. Both O-rings and gaskets are used for sealing applications to prevent fluid or gas leakage. However, O-rings have a specific circular shape look like a doughnut while gaskets come in various shapes and designs.
In some cases, an O-ring can be replaced with a gasket depending on the application. However, it is essential to consider factors such as size, shape, material compatibility, and the specific sealing requirements of the application. Consulting with the equipment manufacturer or a sealing specialist can help determine the most suitable replacement option.
Question: How often should O-rings be replaced?
Answer: The frequency of O-ring replacement varies based on factors like application, operating conditions, and material type. Here are some general guidelines:
1. Visual Inspection: Regularly inspect O-rings for wear, damage, or deformation. Replace if tears or flattening are observed.
2. Leakage: If there is noticeable fluid or gas leakage, consider replacing the O-ring.
3. Age and Service Life: Follow manufacturer's recommendations or industry standards for the expected service life of the O-ring material.
4. Maintenance Schedule: Adhere to the equipment manufacturer's maintenance plan, which may include periodic O-ring replacement as preventive maintenance.
5. Environmental Factors: Consider temperature extremes, chemical exposure, and high-pressure environments, which can accelerate O-ring deterioration and require more frequent replacement.
Question: Do O-rings need to be lubricated?
Answer: Yes, O-rings typically require lubrication for optimal performance. Lubrication helps reduce friction between the O-ring and the surfaces it contacts, extending its lifespan and improving sealing efficiency. The lubricant acts as a barrier, preventing excessive wear and ensuring smooth movement. It is important to select a compatible lubricant that suits the application's temperature range and the O-ring material. While some O-ring materials are self-lubricating, lubrication is generally recommended unless specific circumstances dictate otherwise. Consulting manufacturer guidelines and considering the specific application requirements are essential for determining the need for lubrication.
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