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 Import Fittings 12304LHCO3SW Coupling
316 Stainless Steel, 1/2 in x 1/2 in Fitting Pipe Size, Coupling - 6JM28|60FC111N012 - Grainger
Stainless steel full coupler 1/2" NPT female - The Electric Brewery
Stainless Steel DN 12 Coupling For Spray Gun Socket G 1/2 inch Female Threads | Tameson.com