{"product_id":"tweco-1240-1230-mig-nozzle-3-4-inch-bore-450a-heavy-duty","title":"Tweco 1240-1230 Mig Nozzle 3\/4 Inch Bore 450A Heavy Duty","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe TWECO 1240-1230 is an adjustable copper MIG welding nozzle designed for use with Tweco No. 4 MIG guns rated up to 450 amps. Machined from 122 DHP copper alloy tubing, the nozzle measures 3.42 inches in length with a 3\/4-inch bore and a 0.97-inch outer diameter. The contact tip-to-nozzle recess relationship is adjustable, allowing the installer to run the tip recessed, flush, or protruding depending on joint geometry and application. The part number is rolled-stamped on the outer surface for fast field identification. Sold in a pack of 2. This nozzle is intended for medium to heavy-duty welding applications and is installed by professional welders and fabricators.\u003c\/p\u003e\u003cp\u003eThis nozzle fits standard gas diffusers used with Tweco No. 4 MIG guns and is suited for medium to heavy-duty MIG welding environments operating up to 450 amps. The adjustable tip relationship makes it versatile across multiple joint types: recessed tip positioning works for high-heat applications and longer electrical stick-out; flush positioning suits shorter arc lengths and tighter stick-out; and protruding positioning allows access to open root pipe welds and tight joints where torch geometry is critical.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAdjustable contact tip relationship: recessed, flush, or protruding positions available\u003c\/li\u003e\n\u003cli\u003eConstructed from 122 DHP copper alloy tubing for excellent conductivity and heat resistance\u003c\/li\u003e\n\u003cli\u003e3\/4-inch bore with 0.97-inch OD — suited for medium to heavy-duty amperage work up to 450A\u003c\/li\u003e\n\u003cli\u003ePart number rolled-stamped on the outer surface for easy identification in the field\u003c\/li\u003e\n\u003cli\u003eSlides over standard nozzle insulator Part No. 34A (Stock No. 1340-1100)\u003c\/li\u003e\n\u003cli\u003eSold as a 2-pack per unit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with Tweco No. 4 MIG guns rated up to 450 amps and compatible with the standard gas diffuser and nozzle insulator Part No. 34A (Stock No. 1340-1100).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified welders or MIG gun technicians. Before replacing the nozzle, power down the welder and allow all components to cool fully. Thread or slide the nozzle over the gas diffuser and insulator assembly, confirming the tip position — recessed, flush, or protruding — matches the intended weld joint requirement before resuming operation. Inspect the nozzle and diffuser for spatter buildup regularly to maintain proper gas coverage and weld quality.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Size\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter\u003c\/strong\u003e: 0.97 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNozzle Length\u003c\/strong\u003e: 3.42 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Amperage\u003c\/strong\u003e: 450A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: 122 DHP Copper Alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Tip Relationship\u003c\/strong\u003e: Adjustable (recessed, flush, or protruding)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Insulator\u003c\/strong\u003e: Part No. 34A (Stock No. 1340-1100)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.33 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity per Pack\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: TWECO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1240-1230\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TWECO","offers":[{"title":"Default Title","offer_id":51346454217010,"sku":"1240-1230","price":29.61,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310545931.jpg?v=1782080813","url":"https:\/\/voomisupply.com\/products\/tweco-1240-1230-mig-nozzle-3-4-inch-bore-450a-heavy-duty","provider":"Voomi Supply","version":"1.0","type":"link"}