[Thông Báo] Cập Nhật Địa Chỉ Công Ty và Thông Tin Xuất Hóa Đơn VAT. Xem chi tiết
[Announcement] Update of Company Address and VAT Invoicing Information. See more
Toothed Washer Nuts/Grooved Hex Nuts Toothed washers have teeth on the inner side, the outer side, or both, so that the teeth bite into the fitting part to prevent loosening. Grooved hex nuts can prevent loosening by inserting a pin to lock the bolt into the hole and castle-like groove.