WW-C-621G, FEDERAL SPECIFICATION: COUPLING ASSEMBLY, HOSE (FIRE, WOVEN-JACKETED, RUBBER- OR FABRIC-LINED AND UNLINED) (07-FEB-1990) [S/S BY A-A-59227]

WW-C-621G, FEDERAL SPECIFICATION: COUPLING ASSEMBLY, HOSE (FIRE, WOVEN-JACKETED, RUBBER- OR FABRIC-LINED AND UNLINED) (07-FEB-1990) [S/S BY A-A-59227]., This specification covers expansion ring couplings, screw-in expander couplings, and self-tightening couplings.