Dixon Valve & Coupling - 9/16" Left Hand Thread, Welding Hose Adapter - 48763429 - MSC Industrial Supply
5/8"-18 Unf Male 3/8" Flare Sae X 1/4" Bspp Male Left Hand Coupler Connector Adapter Brass Pipe Fitting For Fuel Gas Water Valve - Pipe Fittings - AliExpress
Propane Adaptor Fitting, 1/4 in. MNPT x 9/16 in. LH MNPT
Airgas - RAD64003979 - RADNOR™ 3/8" - 24 Male X 9/16" - 18 LH Female Brass Acetylene/Fuel Gas Hose Adapter
Anderson Pipe Fittings, Standard Pol Nut, 7/8 Hex x 1-In. Long Propane LH Thread | West True Value
Everbilt 5/8 in. Barb x 3/4 in. MHT Brass Adapter Fitting 800039 - The Home Depot
Midland Metal Mfg. 32439 3/8 Lh Weld Connector, Brass Fittings, Hose Barb, Left Hand 9/16 18 #122lwa Welding Hose Connector | Blackhawk Supply
GHBM025-018 - Bluefin GHBM025-018 - 1/4" Hose Barb x 1/8" NPT Male Brass Pipe Adapter
3/8" Left Hand Thread, Welding Hose Coupling for Acetylene Line: Amazon.com: Tools & Home Improvement