Nut 3/8-16 hex 5/8" flat to flat LLN
3/8-16 hex machine screw nut, steel & zinc 5/8" across flats X 1/4" tall used on leg levelers and other bolts. Also called a JAM nut.
This is the correct lock nut for Williams pinball machines. Enables you to use the same wrench to fasten leg bolts and the leg leveler lock nut.