Full metal lock nut effect: the front sheet metal nut screw thread can be jammed, played locking action. All metal locking nut, also known as metal lock nut, metal self-locking nuts, Division I professional production and sales of all kinds of all-metal hexagon nuts, all metal nuts, metal self-locking nuts, all metal locknut Locking Principle: According to engineering principles to install special locking spring steel, spring steel used in natural nip screw groove, shockproof, anti-loosening effect one hundred percent and repeated friction and locking screw was not affected, spring steel. The company supplies self-locking nut quality assurance, welcome to consult the discussion.