12201345 - Tweco WeldSkill 22 Series MIG Nozzle, 3/8" Bore, Slip-On (2-Pack)

Technical Overview of the Tweco WS22-37SS Nozzle

The ESAB Tweco WS22-37SS (Stock Number 1220-1345) is a specialized gas nozzle designed for the WeldSkill and Mini-MIG series of MIG welding guns. Part of the industry-standard Tweco 22 Series, this nozzle features a 0.375-inch (3/8") bore diameter, making it suitable for light-to-medium duty applications where precision and access to confined spaces are required. The nozzle utilizes a slip-on connection mechanism, which relies on a friction fit over the gas diffuser or nozzle insulator, eliminating the need for threads and facilitating rapid removal for maintenance.

Manufactured from high-grade copper alloy, the WS22-37SS is engineered to dissipate heat effectively, prolonging the service life of the front-end consumables. The "SS" designation typically indicates a specific geometry or packaging configuration within the WeldSkill line, often associated with a flush contact tip relationship when used with standard 11 Series tips and compatible gas diffusers. This flush relationship provides excellent visibility of the arc and puddle while maintaining adequate gas shielding coverage.

This product is supplied as a package of two (2) nozzles, ensuring operators have immediate replacements available. It is directly compatible with Tweco WeldSkill 140, 180, and 220 MIG guns, as well as legacy Tweco Mini-MIG and No. 1 / No. 2 guns configured with slip-on front ends. The 3/8" bore is particularly advantageous for short-circuit MIG welding on thinner gauge materials where a focused gas column is necessary to prevent porosity without wasting shielding gas.