WW-P-471C, FEDERAL SPECIFICATION: PIPE-FITTINGS: BUSHINGS, LOCKNUTS, AND PLUGS; IRON, STEEL, AND ALUMINUM; (THREADED); 125-150 POUNDS (29-DEC-1981) [S/S BY A-A-59616]

WW-P-471C, FEDERAL SPECIFICATION: PIPE-FITTINGS: BUSHINGS, LOCKNUTS, AND PLUGS; IRON, STEEL, AND ALUMINUM; (THREADED); 125-150 POUNDS (29-DEC-1981) [S/S BY A-A-59616]., This specification covers the requirements for bushings, locknuts, and plugs made of aluminum, iron, or steel.