100pcs M3-0.5mm Pitch Black Nylock Nuts Nylon Insert Self Locking Nuts for RC
Thread size: M3; – Pitch: 0.5mm;. 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.