Amazon.com: TEKTON 3/8 Inch Drive (F) x 1/2 Inch (M) Adapter | SHA14102 : Everything Else
Amazon.com: 1/2” Female NPT to 3/8" Male NPT Coupling Brass Pipe Fitting Gauge Adapter : Automotive
BrassCraft 3/8 in. FIP and 1/2 in. FIP Brass Water Supply Adapter BCRP16 D - The Home Depot
Threading Adapter, NPT 1/2 Female to G 3/8 Male
3 Piece Socket Adapter Set Increasing 3/8" 1/2" 3/4" Female 1/4" 3/8" 1/2" Male - Walmart.com
RV Faucet Adapter 1/2 to 3/8 Reducer Faucet Supply Line Adapter Brass 3/8 Compression Fitting Compatible with Water Pipe Coector 2 Pieces - Walmart.com
LTWFITTING 1/2 in. FIP x 3/8 in. MIP Brass Pipe Adapter Fitting (20-Pack) HF1028620 - The Home Depot
Everbilt 3/8 in. Comp x 1/2 in. MIP Brass Adapter 804599 - The Home Depot
1/2 to 3/8 Reducer Faucet Adapter - Compression Brass Pipe Fitting, 3/8 Male to 1/2 Male Supply Line Adapter for RV Kitchen Plumbing, Water Hose Pipe Connector with Rubber Washer, (2 Pack) - Amazon.com
3/8" Male NPTF X 1/2" Male NPTF Reducing Adapter | Calóre Equipment