Xtrweld 21-37 Mig Nozzle Self-insulated 3/8 Inch Tweco Style

Product Description

The XTRWELD 21-37 is a self-insulated, threaded MIG nozzle designed as an OEM-quality replacement consumable for Tweco-style MIG welding guns. Measuring 3/8 inch in diameter and 0.85 inches in width, this nozzle installs at the front end of the MIG gun to direct shielding gas flow around the weld puddle. It is rated for use with guns operating in the 100-amp to 160-amp range. Each nozzle is marked with the part number or size directly on the component, simplifying identification in multi-consumable inventory. Welding technicians and fabricators working with Tweco-compatible equipment will find this a direct drop-in replacement.

This nozzle is suited for light- to medium-duty MIG welding applications in fabrication shops, maintenance and repair operations, and production environments where Tweco-style gun consumables are standard. It is appropriate for use in both single-pass and multi-pass welding scenarios within its rated amperage range. The self-insulated design reduces the risk of arc-out between the nozzle and contact tip holder, which is a common failure point under continuous duty conditions.

Key Features

• Self-insulated construction reduces arc-out risk between nozzle and contact tip holder
• Threaded mount for secure, repeatable installation and removal
• Rated for Tweco-style MIG guns from 100A to 160A
• 3/8 inch diameter bore for consistent shielding gas coverage
• Part number marked directly on nozzle for easy inventory identification
• OEM-quality interchangeability with Tweco and Tweco Weldskill Classic and Mini-MIG style guns

Compatibility

Compatible with Tweco-style MIG guns rated 100A to 160A, including the Classic Weldskill and Mini-MIG platforms. Designed as an OEM-style replacement consumable for Tweco-pattern front-end assemblies.

Installation Notes

Installation is performed by welding technicians as part of routine front-end consumable maintenance. Always disconnect the MIG gun from the welder and release any residual wire tension before removing or installing nozzles. Use the appropriate nozzle wrench or pliers to seat the threaded nozzle fully without cross-threading. Inspect the contact tip and gas diffuser for wear at the same service interval.

Technical Specifications

• Nozzle Diameter: 3/8 inch
• Width: 0.85 inches
• Amperage Range: 100A to 160A
• Mount Type: Threaded
• Insulation Type: Self-insulated
• Weight: 0.26 pounds
• Compatible Gun Style: Tweco-style

Standard Information

• Brand: XTRWELD
• Manufacturer Part Number: 21-37