Threads into black pipe at the bottom of your gas system, for connecting to the 3/8'' female flare fitting on the end of your propane regulator hose. Look at the regulator picture at left. Made from brass.
Everbilt 1/2 in. Female Flare x 3/8 in. MIP Brass Gas Fitting
Hgzaccompany Brass Tube Flare Fittings,Union Connector Gas Adapter,BrassTube Coupler 1/2 inch Male Flare to 1/2 inch Male Flare 2 Pack : : Industrial & Scientific
Hgzaccompany Brass Tube Flare Fittings,Union Connector Gas Adapter,BrassTube Coupler 1/2 inch Male Flare to 1/2 inch Male Flare 2 Pack : : Industrial & Scientific
Apollo 1-1/2 in. Barb Insert Blue Twister Polypropylene x MPT
[Material]: Heavy-duty brass,strong and stable,with corrosion resistance,high temperature ductility and low permeability [Features]: Both ends of this
3/8 Inch Male Flare x 3/8 Inch Male Flare Connector Gas Adapter Union BrassTube Coupler Pipe Flare Fitting (2PCS)
Everbilt 1/2 in. Female Flare x 3/8 in. MIP Brass Gas Fitting
Half Union Gas Adapter 3/8 Flare X 3/8 NPT Male Pipe Connector - China Pipe Fitting, Brass Gas Fittings
6AN Male Flare To 1/2 NPT Male Adapter Fitting With Black Finish
BrassCraft 1/2 in. MIP x 3/8 in. Flare x 36 in. Stainless Steel
Apollo 1-1/2 in. Barb Insert Blue Twister Polypropylene x MPT
2 PCS Compression Metals Brass Couples Tube Fitting, Half-Union Gas Adapter, 3/8 Flare x 1/2 Male Pipe - AliExpress