Dixon Valve Coupling MSC1520409K Oxygen Hose Coupling

Product Description

The DIXON VALVE COUPLING MSC1520409K is a brass welding hose coupling designed for oxygen line service. It features a 9/16 inch right-hand thread (UNF standard) and a 1/4 inch inner diameter, making it a direct-connect fitting for low-pressure oxygen hose assemblies. The brass construction resists corrosion and meets the material compatibility requirements for oxidizing gas service. Welders, gas-supply technicians, and industrial maintenance professionals install this coupling when assembling or repairing oxygen delivery hose runs in welding and cutting setups.

This coupling is suited for use in both shop and field welding environments where oxygen hose connections require a threaded, mechanically secure fitting. The right-hand thread orientation follows standard oxygen-side convention, distinguishing it from fuel-gas fittings that use left-hand threads. Typical applications include oxy-fuel cutting rigs, welding stations, and industrial gas distribution lines where reliable, leak-resistant hose terminations are required.

Key Features

• Brass construction for compatibility with oxygen service and corrosion resistance
• 9/16 inch UNF right-hand thread follows standard oxygen-line thread convention
• 1/4 inch inner diameter suits common oxygen hose sizes
• Threaded connection type provides a secure, field-serviceable joint
• Lightweight at 0.1 pounds for easy handling during hose assembly

Compatibility

Designed as an OEM-style replacement or service fitting for oxygen hose assemblies using a 9/16 inch right-hand UNF threaded coupling with 1/4 inch ID hose.

Installation Notes

Installation should be performed by a qualified welder or gas-supply technician familiar with compressed-gas hose fittings. Always shut off the oxygen supply valve and bleed residual pressure from the hose before replacing or installing any coupling. Use only tools and thread sealants approved for oxygen service — never apply standard pipe dope or petroleum-based compounds to oxygen fittings, as these create a fire and explosion hazard. Inspect threads and seating surfaces for damage before assembly and pressure-test the connection before returning the system to service.