ITEM NAME:Lock Nut 50Pcs M20 Stainless Steel Hex With Nylon Insert By Bolt Dropper High Description: Top Grade 304 stainless steel nylon lock nuts. Providing better security and firm hold. Highly resistant against turning, preventing the lock nuts from weakening and loosening under vibration and torque. Insert lock nuts: Guaranteed to stay intact and in firm hold making virtually indestructible. Size: M20 (Pack of 10 pieces of each size) Package Includes: 10 Pieces Lock Nuts SKU: DMO0022731579003342.Top Grade 304 stainless steel nylon lock nuts. Highly resistant against turning, preventing the lock nuts from weakening and loosening under vibration and torque. 10 Pieces Lock Nuts. Providing better security and firm hold.