20642067 - Tweco WC66-N Water Cooled Tube Nut 2064-2067

Keep Your Water-Cooled Torch Running Dry and Cool

If you are running a water-cooled Tweco MIG gun, you know that leaks are the enemy. A dripping connection isn't just messy; it can ruin your liner, short out your trigger, or mess up your puddle with hydrogen porosity. The Tweco WC66-N Tube Nut (2064-2067) is the exact part you need to lock down those water lines and keep the coolant flowing where it belongs—around the torch, not on the floor. Whether you are rebuilding an old gun or just fixing a line that popped loose, this nut is the factory-correct part for the job.

Over time, threads can get stripped, or the hex head can get rounded off from too many quick fixes with a pair of pliers. When that happens, you can't get the torque you need to seat the O-rings or compression fittings properly. Swapping out the old, beat-up nut for a fresh WC66-N ensures you can tighten everything down securely. It is machined to fit your Tweco WC66 series gun perfectly, so you don't have to fight with cross-threading or loose connections. It’s a small part, but it does a big job in keeping your torch temperature down and your duty cycle up.

Don't risk your expensive water-cooled rig on a hardware store nut that might not handle the heat. This genuine Tweco part is built to take the abuse of a welding shop. It resists corrosion from the coolant and stands up to the heat of the arc. Keep a few of these in your spare parts kit so you aren't stuck waiting on shipping when a maintenance issue pops up in the middle of a shift. Swap it out, leak-check your system, and get back to laying beads with confidence.