{"product_id":"tweco-1240-1877-heavy-duty-mig-nozzle-5-8-inch-bore","title":"Tweco 1240-1877 Heavy Duty Mig Nozzle 5\/8 Inch Bore","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe TWECO 1240-1877 is a heavy duty MIG welding nozzle from the Velocity2a series, designed for professional welders who demand reliable, consistent performance in demanding fabrication environments. Featuring a 5\/8 inch bore, this nozzle uses a single-thread design that pairs brass threads on the nozzle body against heat-treated stainless steel threads on the gooseneck. The soft-against-hard thread combination resists seizing and cross-threading, a common failure point with standard MIG consumables. Licensed welding professionals and industrial fabricators install this nozzle as a direct consumable replacement during routine gun maintenance.\u003c\/p\u003e\u003cp\u003eThe 1240-1877 is suited for MIG welding applications in both production shop and field environments. The Velocity2a design eliminates the two or three thread sets found on conventional MIG consumables, reducing downtime during nozzle changes. The fixed threaded configuration maintains a consistent flush relationship between the nozzle opening and the contact tip, which supports repeatable weld positioning. This nozzle is sold individually and is appropriate for use in heavy duty MIG gun setups where bore size and thread reliability are critical to weld quality.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e5\/8 inch bore size for heavy duty MIG welding applications\u003c\/li\u003e\n\u003cli\u003eSingle-thread design reduces seizing, cross-threading, and tool dependency compared to conventional two- or three-thread consumables\u003c\/li\u003e\n\u003cli\u003eBrass nozzle threads mate against heat-treated stainless steel gooseneck threads for extended service life\u003c\/li\u003e\n\u003cli\u003eFixed threaded style maintains consistent flushness between nozzle opening and contact tip\u003c\/li\u003e\n\u003cli\u003eCompact form factor at 2.25 inches in length for use in tight weld access situations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement nozzle for heavy duty MIG welding guns compatible with the TWECO Velocity2a consumable system.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified welders or maintenance technicians during routine MIG gun servicing. Disconnect and de-energize the welding power source before removing or installing any consumable components. The tool-free single-thread design allows hand installation without wrenches; do not use pipe wrenches or pliers on the nozzle body. Inspect the gooseneck threads for wear or spatter buildup before threading on a replacement nozzle.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Size\u003c\/strong\u003e: 5\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Velocity2a Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Design\u003c\/strong\u003e: Single-thread, brass on stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 2.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.27 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 608246434681\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: 1240-1877\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TWECO","offers":[{"title":"Default Title","offer_id":51342907998514,"sku":"1240-1877","price":109.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310545956.jpg?v=1782010238","url":"https:\/\/voomisupply.com\/products\/tweco-1240-1877-heavy-duty-mig-nozzle-5-8-inch-bore","provider":"Voomi Supply","version":"1.0","type":"link"}