Nylon insert lock nut works as a lock washer to keep fasteners secure in high-vibration applications. Features Zinc-plated to resist corrosion. Set includes: ten 1/2'' x 13; twenty five each: 10 x 24; 1/4'' x 28; 3/8'' x 16; thirty: 5/16'' x 18; thirty five: 1/4'' x 20. Handy PVC storage case.

SKU: 7474D