Adapter Male Threaded. 20 x 25 x 3/8", 20 x 25 x 1/2", 20 x 25 x 3/4", 25 x 32 x 1/2", 25 x 32 x 3/4", 25 x 32 x 1", 32 x 40 x 3/4", 32 x 40 x 1".
Common Thread Size Name For 3/8": 10mmActual Thread Size For 3/8": 16.1mmCommon Thread Size Name For 1/2": 15mmActual Thread Size For 1/2": 21.6mmCommon Thread Size Name For 3/4": 20/22mmActual Thread Size For 3/4": 25.5mmCommon Thread Size Name For 1": 25mmActual Thread Size For 1": 32.9mm