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

Keep Your Arc Smooth and Steady

When you are pushing heavy wire all day, the last thing you want is a contact tip that overheats, keyholes, or fuses up halfway through a pass. The Tweco 15H-45 Heavy Duty Contact Tip is built for the welder who demands reliability. Designed to fit the big guns—like the Tweco #5 and #6—this tip is beefier than the standard consumables found on smaller machines. That extra copper means it handles heat better, stays cooler, and keeps your arc focused right where you want it.

These tips are sized perfectly for 0.045" wire, the workhorse diameter for structural steel and heavy fabrication. Because they are genuine Tweco parts, you don't have to worry about sloppy threads or inconsistent bore sizes. They thread in tight (3/8"-24) and provide the clean electrical transfer you need to lay down smooth beads with minimal spatter. Whether you are running spray transfer or short circuit, a fresh 15H-45 tip helps prevent those annoying micro-arcing issues inside the bore that lead to erratic feeding.

This pack comes with 25 tips, so you can stock up your toolbox or the shop locker. Stop fighting with worn-out consumables that drift and stick. Swap in a fresh Tweco 15H-45 and get back to burning metal with confidence. Ideal for shipyards, heavy equipment repair, and structural steel shops where downtime isn't an option.