21-50 - 21-50 MIG Nozzle 1/2" Bore, 1/8" Recess - Tweco Style (2-Pack)

High-Performance 21-50 MIG Nozzle (Tweco Style)

The 21-50 Tweco Style MIG Nozzle is a premium replacement consumable designed for light to medium-duty welding applications. Engineered to meet the rigorous demands of industrial fabrication, this nozzle is fully compatible with Tweco® Professional No. 1 MIG guns, as well as Lincoln® Magnum® 100L, Weldskill® 140A, 180A, and 220A series guns. This package contains two (2) nozzles, ensuring you have a backup ready for continuous operation.

Constructed with a sophisticated 3-piece design, this nozzle integrates a 122 DHP copper alloy tubing housing, a solid machined brass insert, and a G7 silicone insulator. This combination provides superior thermal conductivity and electrical insulation without the need for additional external insulators. The nozzle threads directly onto the gas diffuser (compatible with 35-50 diffusers), creating a secure seal that optimizes shielding gas flow and minimizes turbulence.

With a 1/2-inch (12.7mm) bore, this nozzle offers excellent gas coverage for standard wire sizes and welding positions. The 1/8-inch (3.2mm) tip recess is critical for protecting the contact tip from molten spatter and reducing the risk of electrical shorts against the workpiece. Rated for applications up to 180 amperes, the 21-50 nozzle is an essential component for maintaining arc stability and weld quality in automotive, maintenance, and general fabrication environments.

Technical Specifications

• Series: 21 Series


• Bore Diameter: 1/2" (12.7mm)


• Tip Recess: 1/8" (3.2mm)


• Connection: Screw-on (fits 35-50 diffuser)


• Material: Copper Alloy Housing, Brass Insert, Silicone Insulator