304 Stainless Steel Reducer 3/4" Bsp Male Thread To 1/2" Bsp Female Thread Reducing Bush Adapter Fitting Gas Air Water Fuel - Pipe Fittings - AliExpress
316 Stainless Steel, 3/4 in x 1/2 in Fitting Pipe Size, Reducing Bushing - 14M056|12-8 RB-SS - Grainger
3/4" MIP x 1/2" FIP Stainless Steel Pipe Reducer Bushing at Menards®
Horiznext male thread reducer, stainless steel 304 hex pipe fitting, npt 1" to NPT 3/4" adapter, 1-1/4 to 1 inch o.d. water connector (Pack of 2) - Amazon.com
U.S. Solid 304 Stainless Steel Lead Free 6000 psi High Pressure Hex Nipple, 3/4" x 1/2" NPT Male Thread Pipe Adapter(1 pc) - U.S. Solid