G27721 ` (Pkg 12) Serrated 1/4"-20 Thread Size Zinc Plated 7/16" Hex Lock Nut

Serrated 1/4"-20 lock nut made to resist rotation by gripping the mounting surface with serrated edges on the bottom surface. These types of serrated lock nuts are better at resisting rotation from vibration than regular lock nuts. Sold in a package of 12.