This is a valveless version for pressure washers.
Snaptite H Series (Brass) Coupler (BSPP/NPT), valved and unvalved.
TEMA Interchange - TFH Series (Valved) Coupler
Snaptite H Series (Stainless Steel) Coupler (BSPP/NPT), valved and unvalved.
DIN Standard - PDV-O Series Nipple, valveless version for pressure washers