Gr 8 Lock Nuts 3/8"-16

Sold in sets of 100 It has a locking mechanism that’s built into the cone, as you put it on, it starts to act like a locking nut, it’s self-contained feature creates frictional interference between the threads of the mating components. When fastening a prevailing torque lock nut, there is a resistance to rotation during both assembly and disassembly requiring them to be wrenched; that resistance is called prevailing torque. They can be adjusted or removed after installation.