Dixon Valve Coupling MSC1520509K Oxygen Hose Coupling

Product Description

The DIXON VALVE COUPLING MSC1520509K is a brass welding hose coupling designed for oxygen line service. It features a 9/16 inch right-hand thread with a UNF thread standard and a 5/16 inch inner diameter. This fitting is used to connect oxygen supply hoses in welding and cutting setups. The all-brass construction provides the corrosion resistance and compatibility required for oxygen service. Licensed welding technicians and industrial gas fitters install this type of coupling as part of oxy-fuel system assembly or hose replacement work.

This coupling is suited for residential and light commercial welding stations, fabrication shops, and job-site oxy-fuel cutting rigs. It is used wherever a reliable, oxygen-safe threaded hose connection is needed on the oxygen side of a welding outfit. The right-hand thread direction follows standard oxygen line convention, distinguishing it from fuel gas fittings which use left-hand threads.

Key Features

• Brass construction rated for oxygen line service
• 9/16 inch UNF right-hand thread for oxygen hose connections
• 5/16 inch inner diameter hose barb or fitting bore
• Threaded connection type for secure, leak-resistant assembly
• Right-hand thread direction confirms oxygen line identification per welding industry convention

Compatibility

Designed as an OEM-style replacement or service fitting for oxygen supply hoses in oxy-fuel welding and cutting systems using 9/16 inch UNF right-hand threaded connections.

Installation Notes

Installation should be performed by a qualified welding technician or industrial gas fitter familiar with oxygen system safety requirements. Shut off the oxygen supply valve and fully depressurize the hose before disconnecting or replacing any fitting. Use only thread sealants and lubricants approved for oxygen service, as petroleum-based compounds present a fire hazard in high-oxygen environments. Inspect the mating hose end and threading for damage before assembly.