One-Touch Fitting KQ2 Series Hexagon Socket Head Male Connector KQ2S (Motion Gasket Seal)

- See the catalog for details on materials and specifications.
- Product images may be representative images. Refer to the catalog for details.
A one-touch male connector fitting with hex socket head (KQ2S) and gasket seal from SMC.
[Features]
· Improved tube insertion/removal.
· Compact and light weight.
[Applications]
· A male connector with a hexagonal head that can be tightened with a hex wrench. Ideal for use in confined spaces.
[See here for catalog]
· Applicable tube outer diameter (metric), Connection thread [G], Release button: oval (pp. 60) / circle (pp. 168)
· Applicable tube outer diameter (mm), Connection thread [R], Release button: oval (pp. 68) circle (pp. 176)
· Applicable tube outer diameter (inches), Connection thread [NPT], Release button: oval (pp. 76) circle (pp. 188)
Hexagon Socket Head Male Connector KQ2S (Gasket Seal) Details Example

Hexagon Socket Head Male Connector KQ2S03/04 product image example

Hexagon Socket Head Male Connector KQ2S04/06/08/10/12/16 product image example
Hexagon Socket Head Male Connector KQ2S (Gasket Seal) Specification Example
| Usable fluids | Air, water Note 1: | |
|---|---|---|
| Operating pressure range Note 2: | -100 kPa to 1 MPa | |
| Guaranteed proof pressure (at 23°C) | 3 MPa | |
| Ambient temperature and fluid temperature | -5 to 60°C, For water: 0 to 40°C (no freezing) | |
| Thread | Mounting section | ISO 16030 (parallel pipe thread) |
| Nut section | JIS B0205 (metric fine thread) | |
| Thread part sealant | Seal ring | |
- Note 1: The surge pressure must be under the maximum operating pressure.
- * Note 2: Do not use the fittings with a leak tester or for vacuum retention because they are not guaranteed for zero leakage.
Main Component Materials
| Body | C3604, PBT |
|---|---|
| Stud | C3604 (thread part) |
| Chuck | SUS304 |
| Guide | SUS304 |
| Release button | POM |
| Seal, O-ring, seal ring | NBR |
Hexagon Socket Head Male Connector KQ2S (Gasket Seal) Dimensions Example
KQ2S03/04 Series
(Units: mm)

KQ2S03 Series dimensional drawing example
(Units: mm)

KQ2S03 Series release button dimensional drawing example
| Applicable tube outer diameter Inches | Connection thread NPT | Model | H (width across flats) | øD | Release Button Dimensions | L1 | L2 | A | M | Effective area (mm2) | Minimum hole diameter | Weight g | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| X | Y | Nylon | Urethane | |||||||||||
| ø5/32 | 1/16 | KQ2S03-33□P1 | 2.78 | 12 | 7.7 | 10 | 19 | 16.3 | 13.6 | 13.3 | 4.1 | 3.6 | 2.8 | 7.5 |
| 1/8 | KQ2S03-34□P1 | 2.78 | 14 | 7.7 | 10 | 17.3 | 16.3 | 11.9 | 13.3 | 4.1 | 3.6 | 2.8 | 9.2 | |
| ø3/16 | 1/8 | KQ2S05-34□P1 | 3.57 | 14 | 8.4 | 11 | 19.8 | 18.8 | 14.4 | 13.3 | 7.8 | 6.5 | 3.6 | 11.7 |
- *□: A (Brass), N (Brass + electroless nickel plating)
KQ2S04/06/08/10/12/16 Series
(Units: mm)

KQ2S04/06/08/10/12/16 Series dimensional drawing example
| Applicable tube outer diameter mm | Connection thread G | Model | H (width across flats) | øD Note: | L1 | L2 | A | M | Effective area (mm2) | Minimum hole diameter | Weight g | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nylon | Urethane | |||||||||||
| ø4 | 1/8 | KQ2S04-G01□ | 3 | 13 | 20.6 | 19.6 | 15.1 | 13.3 | 4.1 | 3.6 | 3.1 | 11.6 |
| ø6 | 1/8 | KQ2S06-G01□ | 4 | 13 | 19.8 | 18.8 | 14.3 | 13.3 | 10 | 9.9 | 4.1 | 9.7 |
| 1/4 | KQ2S06-G02□ | 4 | 18 | 19.8 | 18.8 | 13.3 | 13.3 | 10.7 | 10 | 4.1 | 18 | |
| ø8 | 1/8 | KQ2S08-G01□ | 5 | 13 | 21.7 | 19.7 | 16.2 | 14.2 | 17.2 | 16.2 | 5.1 | 9.5 |
| 1/4 | KQ2S08-G02□ | 6 | 18 | 20.5 | 19.5 | 14 | 14.2 | 23.3 | 16.2 | 6.1 | 17.2 | |
| 3/8 | KQ2S08-G03□ | 6 | 22 | 20.7 | 19.7 | 13.2 | 14.2 | 23.3 | 16.2 | 6.1 | 27.1 | |
| ø10 | 1/8 | KQ2S10-G01□ | 5 | 15.6 | 23 | 21.1 | 17.5 | 15.6 | 17.2 | 16.2 | 5.1 | 10.9 |
| 1/4 | KQ2S10-G02□ | 8 | 18 | 24.1 | 20.1 | 17.6 | 15.6 | 39 | 26.6 | 8.1 | 19.2 | |
| 3/8 | KQ2S10-G03□ | 8 | 22 | 21.4 | 20.1 | 13.9 | 15.6 | 39 | 26.6 | 8.1 | 25 | |
| 1/2 | KQ2S10-G04□ | 8 | 26 | 21.1 | 20.1 | 12.1 | 15.6 | 39 | 26.6 | 8.1 | 34.1 | |
| ø12 | 1/4 | KQ2S12-G02□ | 8 | 18.2 | 25.6 | 21.5 | 19.1 | 17 | 46 | 44.5 | 8.1 | 18.3 |
| 3/8 | KQ2S12-G03□ | 10 | 22 | 23.8 | 21.8 | 16.3 | 17 | 60 | 44.5 | 10.1 | 25.7 | |
| 1/2 | KQ2S12-G04□ | 10 | 26 | 22.8 | 21.8 | 13.8 | 17 | 60 | 44.5 | 10.1 | 35.6 | |
| ø16 | 3/8 | KQ2S16-G03□ | 10 | 23.6 | 30.8 | 25.4 | 23.3 | 20.6 | 81 | 67 | 10.1 | 29.2 |
| 1/2 | KQ2S16-G04□ | 12 | 26 | 30.3 | 26.1 | 21.3 | 20.6 | 113 | 67 | 12.1 | 45.8 | |
- *Note: øD is the maximum diameter.
- * □: A (Brass), N (Brass + electroless nickel plating)