57Y04 - Weldcraft 57Y04 Short Back Cap for 17/18/26 Series Torches (2-Pack)

Genuine Weldcraft Performance for Precision TIG Applications

Maximize the versatility of your TIG welding setup with the genuine Weldcraft 57Y04 Short Back Cap. Engineered as a direct replacement for 17, 18, and 26 series torches, this component is a staple in the toolkits of professional fabricators who demand adaptability and performance. The primary function of the back cap is to apply pressure to the collet, locking the tungsten electrode securely in place while sealing the rear of the torch head. The 57Y04 excels in this role while offering a compact form factor that transforms a standard torch into a tool capable of navigating the tightest welding joints.

Quality materials are the hallmark of the Weldcraft brand, now under the Miller Electric umbrella. This short back cap is fabricated from a specialized phenolic compound designed to resist high temperatures and physical impact. Unlike cheaper alternatives that may crack or deform under the heat of high-amperage AC welding, the Weldcraft 57Y04 maintains its structural integrity, ensuring consistent pressure on the collet and reliable current transfer. The inclusion of a high-grade O-ring ensures a hermetic seal, critical for maintaining the integrity of the shielding gas envelope and protecting the weld from oxidation.

The 57Y04 is particularly valuable for applications requiring intricate torch manipulation. By reducing the torch's tail length, the center of gravity shifts forward, potentially reducing wrist strain during out-of-position welding. However, the primary benefit remains access. When welding headers, exhaust systems, or inside vessel corners, the clearance provided by this short cap is often the difference between a successful weld and a compromised one. Note that this cap requires the use of tungsten electrodes cut to approximately 2 inches or less, making it an ideal way to recycle used tungsten stubs.

This package includes two (2) short back caps, providing a backup for field work or busy shop environments. It is fully compatible with air-cooled WP-17 and WP-26 torches, as well as water-cooled WP-18 torches. Trust in genuine Weldcraft parts to maintain the performance and longevity of your TIG welding equipment.