Dixon Valve Coupling MSC1540306K Welding Hose Coupling

Product Description

The DIXON VALVE COUPLING MSC1540306K is a brass welding hose coupling designed for acetylene line service. It features a 3/8 inch left-hand thread connection conforming to UNF thread standards. Left-hand threading is a standard safety convention for fuel gas connections, helping prevent accidental cross-connection with oxygen-side fittings. The brass construction resists corrosion and is compatible with acetylene gas handling. This coupling is installed by welding technicians and gas equipment service professionals during hose assembly, repair, or replacement on oxy-acetylene welding and cutting rigs.

This coupling is suited for use on acetylene supply hoses in both shop and field welding applications. It is appropriate for residential welding setups, light fabrication shops, and commercial welding operations where acetylene is delivered through flexible hose assemblies. The 3/16 inch inner diameter sizing is consistent with standard acetylene hose connections. It ships as a single unit, making it a practical replacement part for damaged or worn couplings on existing hose assemblies.

Key Features

• Left-hand thread per UNF standard — standard safety convention for acetylene and fuel gas fittings
• Brass construction for corrosion resistance in gas service environments
• 3/8 inch threaded connection for secure hose attachment
• 3/16 inch inner diameter for compatibility with standard acetylene hose
• Threaded connection type for reliable, tool-assisted assembly

Compatibility

Designed for use on acetylene supply hoses requiring a 3/8 inch left-hand UNF threaded coupling with a 3/16 inch inner diameter.

Installation Notes

Installation should be performed by a qualified welding equipment technician or gas supply professional. Shut off the acetylene supply at the cylinder valve and bleed the hose before removing or installing any hose fitting. Use appropriate thread sealant approved for fuel gas service — do not use PTFE tape on gas fittings unless the product is specifically rated for gas applications. Verify thread engagement is complete and leak-test all connections with an approved leak detection solution before returning the system to service.