16401405 - Tweco 64H-45 Conductor Tube for Spray Master MIG Guns

Restore Your Spray Master's Performance

If your Tweco Spray Master MIG gun is sputtering, feeding poorly, or overheating at the neck, it might be time to replace the conductor tube. The Tweco 1640-1405 is the genuine replacement "gooseneck" for Spray Master 350 and 450 amp guns. Known in the field as the 64H-45, this tube features the classic 45-degree bend that most welders prefer for all-position welding. It provides the perfect angle to see your puddle clearly without forcing your hand into uncomfortable positions.

A worn-out conductor tube can cause a host of welding problems. Inside the tube, the liner must sit perfectly to guide the wire; if the tube is kinked or the internal surface is rough, you'll experience erratic wire feeding and "bird-nesting" at the drive rolls. Furthermore, as the copper degrades or connections loosen, resistance builds up, causing the neck to get dangerously hot. Swapping in a fresh 1640-1405 tube solves these issues instantly, ensuring the current transfers smoothly to the contact tip for a crisp, consistent arc.

Built tough for the shop floor, this tube comes with a heavy-duty metal jacket to resist spatter adhesion and accidental knocks against the workpiece. It installs easily into the Spray Master handle—simply loosen the retention screw, remove the old neck, and slide the new one in until it seats fully. Whether you are fabricating heavy structural steel or running production parts, keeping a spare conductor tube on hand ensures you never lose a day of work to a damaged torch.

Why Choose Genuine Tweco Parts?

• Perfect Fit: Guaranteed alignment with Spray Master handles and consumables.
• Cooler Operation: Superior copper quality dissipates heat faster.
• Better Feeding: Smooth internal radius prevents wire drag.