SELF LOCK NYLON NUT/Steel, Tall, 1/4-28 MS21044N4 pack of 100Self-Locking Hexagon Nut | Nylon Insert, 1/4-28, 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.1/4-28Regular heightCarbon st..