1/2" 304 Stainless Steel Straight Coupling, Class 150 - NPT
Boshart Industries SSPEX-C05 1/2 Inch PEX Stainless Steel Coupling
Horiznext npt 1/2 (means the inner diameter of the thread is 3/4 inch) cast female taper threaded pipe coupling, stainless steel 304 coupler for mush tun cooler and shower hose, 2 pcs - Amazon.com
Stainless steel full coupler 1/2" NPT female - The Electric Brewery