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9-4 - Weldcraft 9-4 Back Cap Insulator for WP-9/20 Torches (2-Pack)

$9.22/ea Save 28% ($2.59)$6.63/eaPack of 2 — $13.26

Usually ships within 3-5 business days

OVERVIEW

Keep Your TIG Torch in Top Shape

Don't let a cracked or worn-out insulator ruin your weld or damage your torch. The Weldcraft 9-4 Back Cap Insulator is the exact replacement part you need for your WP-9, WP-20, or WP-25 TIG torch. This small but mighty part sits between your torch body and the back cap, ensuring that the electricity stays where it belongs—at the tungsten—and that your shielding gas doesn't leak out the back. A compromised insulator can lead to erratic arcs, poor gas coverage, and even shocks, so it is always smart to keep fresh ones in your kit.

Genuine Quality, Perfect Fit

When it comes to TIG consumables, fitment matters. These are genuine Weldcraft parts, meaning they are built to the exact standards of your original equipment. No filing, no forcing, just a perfect seal every time. Whether you are running a water-cooled WP-20 in a production shop or an air-cooled WP-9 in your garage, these insulators handle the heat and keep you welding.

Value Pack

We know that small parts have a habit of disappearing or breaking right when you need them most. That is why these are sold in a convenient 2-pack. Swap one out now and keep the second one in your toolbox for backup. At Welders Supply, we make it easy to keep your equipment running smoothly with high-quality consumables at the best prices.

Additional Information
Brand:Weldcraft
Item:Insulator
Packaging Description:2-per-ea
Compatible Series:WP-9, WP-20, WP-25
Part Type:Back Cap Insulator

INCLUDED

  • (2) 9-4 Back Cap Insulators

APPLICATIONS

  • Precision TIG welding
  • Aerospace fabrication
  • Automotive repair
  • Pipe welding
  • General maintenance and repair

FAQ

The 9-4 insulator is designed to fit Weldcraft WP-9, WP-20, and WP-25 series TIG torches.

This product is sold as a package of 2 insulators.

It electrically isolates the back cap from the torch body and helps seal the shielding gas within the torch head.

Yes, this is a genuine Weldcraft (Miller Electric) replacement part.

No, the WP-17 series typically uses a different insulator (often the 18-7). The 9-4 is specifically for the smaller 9/20 series bodies.

Over time, heat and tightening can cause the insulator to crack or warp, which can lead to gas leaks or electrical shorts.

It is made from a durable, high-temperature resistant rigid plastic/composite material designed for electrical insulation.

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