Historical
ANSI/ASME B1.20.7-1991 (R2003)
Hose Coupling Screw Threads û Inch
Provides standards for application to the threaded parts of hose couplings, valves, nozzles, and all other fittings used in direct connection with hose intended for domestic, industrial, andgeneral service in nominal sizes of 1/2, 3/8, 3/4, 1, 1 1/4,1 1/2, 2, 2 1/2, 3, 3 1/2, and 4 in.
American Society of Mechanical Engineers [asme]