MIL-C-28840A, MILITARY SPECIFICATION: CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH DENSITY, HIGH SHOCK, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR (26 MAY 1981) [S/S BY MIL-DTL-28840B]., This specification covers circular electrical connectors with removable crimp front release contacts. These connectors are for use with jacketed cable in shipboard applications