{"product_id":"dixon-valve-coupling-msc1540509k-welding-hose-coupling","title":"Dixon Valve Coupling MSC1540509K Welding Hose Coupling","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe DIXON VALVE COUPLING MSC1540509K is a brass welding hose coupling designed for acetylene gas lines. It features a 9\/16-inch left-hand thread in UNF standard, which is the industry convention for fuel gas connections and serves as a built-in safeguard against misconnection with oxygen-side fittings. The 5\/16-inch inner diameter accommodates standard acetylene hose sizes. This fitting is installed by welding technicians, pipefitters, and gas equipment service professionals working on oxy-fuel cutting and welding setups in fabrication shops, maintenance facilities, and field service environments.\u003c\/p\u003e\u003cp\u003eThis coupling is suited for acetylene hose assemblies in both light-duty and production welding applications. It connects the acetylene regulator outlet or torch inlet to the supply hose, providing a leak-resistant threaded interface. The left-hand thread direction follows the Compressed Gas Association convention for fuel gases, making it compatible with standard acetylene hose fittings and torch bodies designed to that specification.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLeft-hand UNF thread direction follows CGA fuel gas conventions, preventing accidental cross-connection with oxygen fittings\u003c\/li\u003e\n\u003cli\u003eBrass construction provides corrosion resistance and durability in welding environments\u003c\/li\u003e\n\u003cli\u003e5\/16-inch inner diameter sized for standard acetylene hose\u003c\/li\u003e\n\u003cli\u003e9\/16-inch thread size fits common acetylene hose coupling standards\u003c\/li\u003e\n\u003cli\u003eThreaded connection type allows hand-tightening and wrench-secured assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation fitting for acetylene hose assemblies using 9\/16-inch left-hand UNF threaded connections with a 5\/16-inch inner diameter hose.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified welding equipment technicians or pipefitters working on oxy-fuel gas systems. Always shut off the acetylene cylinder valve and bleed the hose pressure before removing or installing hose fittings. Left-hand threads tighten counterclockwise — do not use thread sealant or PTFE tape on welding gas fittings unless specifically approved for fuel gas service. Inspect all connections for leaks using an approved leak-detection solution before resuming operation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 9\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Left-hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Acetylene line welding hose coupling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 40141734\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: DIXON VALVE COUPLING\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: MSC1540509K\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DIXON VALVE \u0026 COUPLING","offers":[{"title":"Default Title","offer_id":51704357421362,"sku":"MSC1540509K","price":21.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/dba8d851a540e236be8bae7b6e8f8b38.jpg?v=1788422227","url":"https:\/\/voomisupply.com\/products\/dixon-valve-coupling-msc1540509k-welding-hose-coupling","provider":"Voomi Supply","version":"1.0","type":"link"}