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The Tweco 21-37 (Internal SKU: TWE1210-1300) is a standard gas nozzle designed for use with Tweco Classic No. 1 and No. 2 MIG guns, as well as the Tweco Mini-MIG. This product comes in a convenient package of 2, providing professional fabricators with the necessary consumables to maintain continuous operations. Featuring a 0.375-inch (3/8") bore orifice, this nozzle is optimized for general-purpose MIG welding, offering a focused shielding gas envelope that is critical for protecting the weld pool from atmospheric contamination.
Engineered with the professional in mind, the 21-37 utilizes a slip-on interface that fits securely over the gas diffuser/insulator of the MIG gun. This friction-fit design eliminates the need for threads, which are prone to cross-threading or seizing due to thermal cycling and spatter buildup. The nozzle housing is machined from high-grade copper alloy, chosen for its superior thermal conductivity and durability. This ensures that the nozzle dissipates heat effectively, prolonging the life of the consumable and the front-end parts of the torch.
This nozzle is part of the Tweco 21 Series, which is widely recognized for its reliability in light-to-medium duty industrial applications. The 3/8" bore size is particularly effective for accessing tighter joints where a larger 1/2" or 5/8" nozzle might be too bulky, while still providing adequate gas flow for standard short-circuit MIG welding. It is compatible with standard gas diffusers used in the No. 1 and No. 2 gun series.
Invest in genuine Tweco consumables to maintain the integrity of your welding equipment. The 21-37 nozzle ensures proper gas laminar flow, reducing the risk of porosity and ensuring high-quality weld beads in mild steel, stainless steel, and aluminum applications.
| Additional Information |
|---|
| Brand:Tweco |
| Item:Nozzle |
| Packaging Description:2 in a pack |
| Front End:Tweco |
| Bore Size:3/8" (9.5 mm) |
| Series:21 Series |
| Connection Type:Slip-On |
| Material:Copper Alloy |
| Compatible Guns:Tweco No. 1, Tweco No. 2, Tweco Mini-MIG |
| Part Number:21-37 |
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