Amazon.com: Horiznext npt 1/2 stainless steel hex pipe fitting, 3/4 inch male thread O.D. water hose connector, for valve shower faucet tube air gas line plumbing coupler extension.(4 pcs) : Industrial & Scientific
1/2" KC Nipple Fitting, NPT, 316 Stainless Steel
Stainless Steel Nipple, 1-1/2" x Close (1-3/4") S/40 Thread Both Ends (TBE) 316/316L NPT