12101300 - Tweco 21-37 Slip-On MIG Nozzle 3/8" Bore (2-Pack)

Reliable Gas Coverage for Tweco MIG Guns

The Tweco 21-37 Standard Nozzle is an essential consumable for welders utilizing the popular Tweco No. 1 and No. 2 series MIG guns. This package contains two high-quality nozzles, ensuring you always have a backup ready to keep your production line moving. Designed with a 3/8-inch (9.5 mm) bore, this nozzle provides excellent shielding gas coverage for standard welding applications, particularly when working with short-circuit transfer modes or thinner gauge materials where a tighter gas column is beneficial.

One of the standout features of the 21-37 nozzle is its slip-on connection. Unlike threaded nozzles that can seize up with spatter or heat expansion, the slip-on design allows for rapid removal and replacement. This is particularly useful when you need to clean out the nozzle or replace a contact tip mid-job. The internal insulation ensures that the nozzle remains electrically isolated from the contact tip, preventing accidental arcing and protecting your equipment.

Constructed from a durable copper alloy, these nozzles are built to withstand the intense heat of the welding arc. The material also resists spatter adhesion better than steel alternatives, making it easier to clean and maintain. Whether you are working in an automotive body shop, performing light fabrication, or handling general repairs, the Tweco 21-37 nozzle delivers the consistency and performance professional welders demand.

Key Benefits for the Welder

• Perfect Fit: Specifically engineered for Tweco 180A to 250A guns (No. 1 & No. 2).
• Cost-Effective: The 2-pack packaging offers great value and convenience.
• Easy Maintenance: Slip-on style simplifies spatter removal and tip changes.
• Optimized Flow: 3/8" bore is ideal for standard wire sizes like .023" to .035".

Keep your welds clean and your porosity low by maintaining proper gas shielding. Replace worn or damaged nozzles with genuine Tweco 21-37 parts to ensure your MIG gun operates at peak efficiency.