U.S. Solid 2pcs Brass Pipe Fitting Adapter, Male Pipe x Female Pipe, 1/2" x 1/
Kobalt 1/2-in to 3/8-in Standard Socket Adapter in the Socket Adapters department at Lowes.com
LTWFITTING 1/2 in. FIP x 3/8 in. MIP Brass Pipe Adapter Fitting (20-Pack) HF1028620 - The Home Depot
3 Piece Socket Adapter Set Increasing 3/8" 1/2" 3/4" Female 1/4" 3/8" 1/2" Male - Walmart.com
Adapter Male 1/2" Female 3/8" (LP)
Port Adapter - 3/8 x 1/2 Female Flare x Male Flare Apter Brass - 108 - UR3-68 | HVACDirect.com
Utoolmart 3/8 Inch Drive (F) x 1/2 Inch (M) Impact Socket Adapter for Ratchet Wrenches, Cr-V Converter for Sleeve Reducer, Female to Male, 1Pcs - Amazon.com