These lock and flat washers provide excellent protection and security for nuts and bolts
Made of 304 stainless steel, which is longer lasting than other hardware on the market and will last longer in harsh environments such as high temperature, low temperature and high humidity
Designed to spread the load of a screwed fastening and prevent loosening in industrial, shop, decks and fence building, automotive and home appliances
Black Oxide for more protcection in dayly use. 304 stainless steel will be weak magnetism after forging, please use a professional test paper for testing.