Hex Self-locking Nut
Self locking nut, lock nuts, locknuts, hexagon locking nut, metal insert lock nut, hexagon metal insert, etc. 1). Grade: 4, 6, 8, 10; 2). Material: Carbon steel; 3). Finish: Zinc plate, black, etc. 4). Package: Cartons, gunny bags, etc. 5). ...