SELF LOCK NYLON NUT/Steel, Tall, 5/16-24 MS21044N5 pack of 100Self-Locking Hexagon Nut | Nylon Insert, 5/16-24, Steel, Regular HeightThe hexagonal self-locking nut contains a nylon insert. Made from carbon steel with cadmium type II finish per QQ-P-416. MS21044 series nut.5/16-24Regular heightCarbon..