[M3 110Pcs]

[M4]

[M6]

Nylon locking nut is a round nut, and in its outer open four small slot, you can use the crescent wrench screw on the bolt, the lock nut should be equipped with a shaft disc, it can be used to make the small groove on the bolt and its peripheral groove relative to the fixed groove to prevent that it is loose. Screw threads on the nuts embedded in the nylon extrusion, which makes the nylon deformation deformation. After installation, the nylon and thread completely press into the contact, the extruded nylon on the bolts has a lot of resilience, increased friction, so that the bolt does not come off easily.