MIL-F-18240D, MILITARY SPECIFICATION: FASTENER ELEMENT, SELF-LOCKING, THREADED FASTENER, 250 DEG. F MAXIMUM (25 FEB 1972) [S/S BY MIL-DTL-18240F]

MIL-F-18240D, MILITARY SPECIFICATION: FASTENER ELEMENT, SELF-LOCKING, THREADED FASTENER, 250 DEG. F MAXIMUM (25 FEB 1972) [S/S BY MIL-DTL-18240F]., This specification defines the requirements for self-locking elements for use in externally threaded fasteners such as bolts and screws to be used in fasteners with either UNC, UNJC, UNF, UNJF, UNRC or UNRF threads and where the temperatures will not exceed 250 deg. F.