Nylock Nut 3/8 INCH (Pack Of 15pcs) Nylon lock nut is a round nut, and in its outer open four small slot, you can use the Crescent wrench screw on the stud, the lock nut should be Equipped with a shaft Washer. it can be used to make the small Groove on the stud and its Peripheral Groove relative to the fixed, to prevent its loose. Bolt thread on the nuts Embedded in the nylon Extrusion, Making the Nylon Deformation, after Installation, The nylon and Thread completely Squeeze contact, The extruded Nylon to the bolt A lot of resilience, increased friction, so that the bolt is not easy to loose. the back of the plate to maintain a complete block;Small and exquisite, suitable for all electronic or precision equipment;High resistance to torque;The equipment is convenient, simply press riveting;The series of specifications, can meet a variety of design requirements. Height(Not Include Guiding Slot and Embossing Teeth) Perfect for applications where a thin sheet requires load-bearing threads but still must remain smooth, with no protrusions on either surface.