SELF LOCK NYLON NUT/Steel, Tall, 4-40 MS21044N04 pack of 100Self-Locking Hexagon Nut | Nylon Insert, 4-40, 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.4-40Regular heightCarbon steelPa..