12501130 - Tweco 25I-75 Slip-On MIG Nozzle 3/4" Bore (Pack of 2)

Industrial Grade Tweco 25I-75 MIG Nozzles

The Tweco 25I-75 (Stock No. 1250-1130) is a premium slip-on MIG nozzle designed for industrial fabrication environments utilizing Tweco No. 5 MIG guns. Sold in a convenient package of two, these nozzles are engineered to meet the rigorous demands of high-amperage welding where thermal management and gas coverage are critical. The "25I" designation indicates a 25 Series insulated nozzle, while the "75" denotes a large 0.750-inch (3/4") bore orifice. This specific bore size is optimized for heavy-duty applications, often involving spray transfer modes or large diameter wires where a broad umbrella of shielding gas is necessary to prevent porosity and atmospheric contamination.

Manufactured from high-quality copper alloy, the 25I-75 nozzle provides excellent thermal conductivity, rapidly dissipating heat generated during the welding process. This durability ensures a longer service life even under high duty cycles. The slip-on interface is designed to mate perfectly with Tweco 55 Series gas diffusers, utilizing an internal insulator to maintain electrical isolation and secure fitment. This design eliminates the need for threads, preventing seized nozzles caused by spatter buildup and thermal expansion, thereby reducing downtime during consumable changeovers.

For procurement specialists and facility managers, standardizing on genuine Tweco consumables like the 1250-1130 ensures compatibility and performance consistency across your welding fleet. These nozzles are essential for maintaining the efficiency of 400A to 500A air-cooled MIG gun setups commonly found in structural steel, heavy equipment manufacturing, and shipbuilding sectors. The 2-pack packaging offers a logical restocking unit for tool cribs and maintenance departments.