Everbilt 1/4 in. OD Compression x 3/8 in. Flare Brass Adapter Fitting 800779 - The Home Depot
Amazon.com: SUNGATOR 1/4" Brass Fittings, Air Hose Fittings, 90 Degree Barstock Street Elbow, Hex Nipple Coupling Pipe Fitting Set, 1/4" x 1/4" Female Pipe,1/4" x 1/4" Male Pipe, 1/4" Male x 1/4"
Brass Adapters and Fittings
Tube Fitting 1/4" NPT-M to 1/8" Compression, Brass - MHOxygen
Brass Marine Bulkhead Fitting - Hose ID X Hose ID, bulkhead, hose barb
Everbilt 1/2 in. Barb x 1/2 in. MIP Brass Adapter Fitting 800189 - The Home Depot