Tweco 1240-1854 Mig Nozzle 5/8 Inch Bore Medium Duty

Product Description

The TWECO 1240-1854 is a medium-duty MIG welding nozzle engineered for the Velocity2a consumable platform. It features a 5/8-inch bore opening and is designed to simplify consumable changeout by reducing thread engagement points to a single set. The design pairs brass threads on the nozzle with heat-treated stainless steel threads on the gooseneck. This soft-against-hard thread combination resists seizing and cross-threading — two of the most common causes of downtime on a MIG gun. The nozzle maintains a fixed, consistent flushness relationship between the nozzle opening and the contact tip, which supports repeatable arc positioning across welds.

This nozzle is suited for medium-duty MIG welding applications in fabrication, structural, and general shop environments. The Velocity2a platform targets professional welders who need fast consumable swaps without wrenches or specialty tools. The fixed threaded design holds a consistent nozzle-to-contact-tip relationship, making it a practical choice for production welding where arc consistency matters. The 5/8-inch bore accommodates standard MIG wire diameters used in medium-duty work.

Key Features

• Single-thread design reduces seizing and cross-threading compared to standard two- or three-thread MIG consumables
• Brass nozzle threads mate against heat-treated stainless steel gooseneck threads for long service life
• Fixed threaded configuration maintains consistent flushness between nozzle opening and contact tip
• 5/8-inch bore suits medium-duty MIG welding wire and amperage ranges
• Tool-free installation and removal for faster consumable changeout

Compatibility

Designed for use with the TWECO Velocity2a MIG gun platform. Confirm gooseneck thread type and gun duty cycle rating before substituting for other TWECO consumable series.

Installation Notes

MIG nozzle replacement is performed by welding technicians or experienced operators. Disconnect the welder from power and allow the gun to cool before removing the worn nozzle. Thread the replacement nozzle by hand; no tools are required for the Velocity2a design. Inspect the contact tip and liner condition at each nozzle change interval.

Technical Specifications

• Bore Diameter: 5/8 inch
• Duty Rating: Medium Duty
• Weight: 0.18 pounds
• Height: 2.25 inches
• Width: 1 inch
• Length: 1 inch
• Unit of Measure: Each
• Minimum Order Quantity: 2

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1240-1854