Tweco 1240-1874 Mig Welding Nozzle 3/8 Inch Bore

Product Description

The TWECO 1240-1874 is a medium-duty MIG welding nozzle with a 3/8 inch bore, designed for use in the Velocity2a consumable system. It features a single-thread design that reduces the total number of thread sets compared to conventional MIG nozzles, which typically use two or three. The nozzle uses brass threads that mate against heat-treated stainless steel threads on the gooseneck. This soft-against-hard thread pairing resists seizing and cross-threading, extending service life. Installed without tools, it is suited for production welding environments where fast changeovers matter.

This nozzle fits medium-duty MIG welding applications in fabrication, manufacturing, and general metalworking. It is part of the Velocity2a consumable family, which is engineered to simplify torch maintenance and reduce downtime. The 3/8 inch bore size is appropriate for moderate heat input work and standard wire diameters common in structural and sheet metal welding. Professional welders and welding technicians are the primary installers in both shop and field settings.

Key Features

• Single-thread design reduces thread-related failures versus standard two- or three-thread MIG nozzles
• Brass nozzle threads mate against stainless steel gooseneck threads to resist seizing and cross-threading
• Tool-free installation for fast changeovers in production environments
• Fixed threaded style maintains consistent flushness between nozzle opening and contact tip
• 3/8 inch bore suited for medium-duty heat input and standard MIG wire diameters
• Medium-duty construction balances service life with cost-effective replacement

Compatibility

Designed for use with the Tweco Velocity2a MIG torch system in medium-duty welding applications. Consult torch documentation to confirm nozzle bore size and thread compatibility before installation.

Installation Notes

Installation is performed by welding technicians or qualified welding professionals. Always de-energize the welding power source and allow the torch to cool fully before changing nozzle consumables. This nozzle is designed for tool-free hand installation; do not use pliers or wrenches on the nozzle body, as this can damage the brass threads. Inspect the gooseneck threads for wear or spatter buildup at each nozzle change.

Technical Specifications

• Bore Size: 3/8 inches
• Duty Rating: Medium Duty
• Height: 2.25 inches
• Width: 1 inch
• Length: 1 inch
• Weight: 0.19 pounds
• Thread Material (Nozzle): Brass
• Thread Material (Gooseneck): Heat-treated stainless steel
• Sold As: Each
• UPC: 608246437446

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1240-1874