For a CGA-510 cylinder - Harris® V Series™ Ironworker® Deluxe Heavy Duty Welding and Cutting Outfit 4400376 would need:
Superior Products CGA-510 (POL) Acetylene Cylinder to CGA-300 (Commercial) Acetylene Regulator Adapter A-830
Superior A-830 adapts your CGA-510 (POL) acetylene cylinder to a CGA-300 (Commercial) acetylene regulator. Adapter features solid brass construction and has a 500 PSI service pressure.
Solid brass construction500 PSI service pressureCGA connection clearly stamped on adapterSuitable for use with all major brands of acetylene gas regulators with CGA-300 (Commercial) nut