Pro-source 315090011 Tig Torch Back Cap 4.75 in

Product Description

The PRO-SOURCE 315090011 is a long back cap designed for air-cooled TIG welding torches. The back cap threads onto the rear of the torch body to secure the tungsten electrode and seal the collet body from contamination. At 4.75 inches in length, this is a full-length cap that accommodates longer tungsten electrodes, giving the welder more usable tungsten before resetting. It is a standard replacement consumable installed by welders and welding maintenance techs during routine torch service or tungsten changes.

This back cap fits torch series 17, 18, and 26, which are among the most widely used air-cooled TIG torch configurations in light industrial, fabrication shop, and maintenance welding environments. It is suited for both bench welding setups and handheld applications where a full-length tungsten is preferred for extended reach or visibility in the weld joint. The cap weighs 0.04 pounds, making it a lightweight, low-profile component that does not add noticeable bulk to the torch handle.

Key Features

• Full-length 4.75-inch cap accommodates longer tungsten electrodes
• Compatible with torch series 17, 18, and 26
• Threaded rear seal keeps collet body protected from debris and contamination
• Lightweight at 0.04 pounds for minimal added torch weight
• Standard consumable form factor for fast field or shop replacement

Compatibility

Designed for use with TIG torch series 17, 18, and 26.

Installation Notes

Back cap replacement is performed by welders or torch maintenance personnel with the machine powered down and the gas supply off. Remove the existing cap by unthreading it from the torch body, extract or reposition the tungsten electrode as needed, then thread the new cap on hand-tight. Avoid cross-threading or overtightening, which can damage the torch body threads.