12101102 - Tweco 21-37F MIG Gun Nozzle, 3/8" Bore, Flush Tip (2-Pack)

Genuine Tweco 21-37F Nozzles – 2 Pack

Upgrade your welding setup with the Tweco 21-37F Standard Nozzle, available now in a convenient 2-pack. If you are running a Tweco No. 1 or a Mini-MIG gun, these nozzles are the factory-standard replacement you need to keep your equipment running smoothly. Known for their reliability and ease of use, Tweco consumables are the industry standard for a reason, delivering consistent performance that welders trust.

Why Choose a Flush Nozzle?

Visibility is everything when you are laying down a bead. The 21-37F features a flush tip geometry, meaning your contact tip aligns perfectly with the nozzle opening. This design drastically improves your view of the wire and the arc, making it easier to control your stick-out and travel speed. It is especially helpful for newer welders learning to read the puddle or for experienced fabricators working in tight spots where a recessed nozzle might block the view. The 3/8-inch bore is the sweet spot for general-purpose welding, providing ample gas coverage for standard wire sizes like .023, .030, and .035.

Built for the Shop Environment

Welding generates heat and spatter, and your consumables take the brunt of it. These nozzles are crafted from high-quality copper alloy to resist melting and deformation. The smooth surface finish helps minimize spatter adhesion, making it easier to clean out the nozzle with standard MIG pliers or gel. The slip-on design is a favorite among fabricators because it is fast—just pull it off to clean the diffuser or change a tip, and slide it back on. No threads to strip or get stuck.

Stock Up and Save

Running out of consumables in the middle of a job is a welder's nightmare. With this 2-pack, you get double the utility. Keep one on your gun and one in your toolbox so you are never caught off guard. Whether you are repairing automotive body panels, building furniture, or performing light industrial fabrication, the Tweco 21-37F ensures your shielding gas gets where it needs to go for a porosity-free weld every time.