3/8-in FL x 1/2-in MIP Gas Fitting

Elbow 3/8 FL x 1/2 MIP 49-6D — Western Water & Gas

1/2-In. FL x 1/2-In. MIP Steel Pipe Male Union Adapter

SUNGATOR Brass Compression Tube Pipe Fitting, Straight Coupling Adapter, 3/8 Inch OD x 1/2 Inch NPT Male with an Extra Sealing Tape (4PCS)

Anderson Metals Brass Flare Elbow, Lead Free, 1/4 x 3/8 In. MIP

Natural Gas Fittings

1/2Hose barb x 3/8 male NPT Brass Pipe Fitting NPT thread For Turbo Fuel, Air, Water, Oil, Gas AF-CGQ195 - AliExpress

20-3131-18 , Dormont 20-3131-18 , Flexible Gas Tubing

1/4 Flare x 1/8 MIP Brass Adapter Half-Union at Menards®

Proplus Part # R48FF - Proplus 1/2 In. Fl X 1/2 In. Mip Brass Flare Long Thread Connector - Gas Brass Flare Fittings - Home Depot Pro