11501204 - Tweco 15H-45 Heavy Duty Contact Tip 0.045" (25 Pack)

Heavy-Duty Performance for Industrial Fabrication

The Tweco 15H-45 Contact Tip (Part No. 1150-1204) is a premium consumable designed for high-amperage MIG welding environments. Engineered as part of the renowned Tweco 15 Series, this heavy-duty tip is specifically manufactured to handle the thermal stresses associated with continuous welding at higher currents. It is the standard replacement tip for Tweco No. 5 and No. 6 MIG guns, as well as many industry-standard 400A+ welding guns that utilize the Tweco front-end geometry.

Manufactured from a high-quality copper alloy, the 15H-45 ensures excellent electrical conductivity, which is critical for maintaining a stable arc and ensuring consistent weld penetration. The "H" designation signifies its heavy-duty wall thickness, providing a greater thermal mass than the standard 14 series. This design effectively dissipates heat, reducing the likelihood of the wire fusing to the tip (burn-back) and extending the service life of the consumable. The tip features a precision-machined bore sized strictly for 0.045-inch (1.2mm) welding wire, ensuring optimal electrical contact without excessive drag.

This product is supplied in a bulk package of 25 units, making it an economical choice for high-volume fabrication shops and industrial manufacturing facilities. The tips feature a 3/8"-24 UNF thread, allowing for a secure and conductive connection to compatible gas diffusers (such as the Tweco 55 series). Regular replacement of contact tips is essential for maintaining weld quality, and the 15H-45 offers the reliability required for critical structural and manufacturing applications.