300M - 300M Medium Back Cap for 17/18/26 Series TIG Torches

Reliable Medium Back Cap for TIG Torches

Every TIG welder knows the frustration of trying to fit a standard torch into a tight corner, only to have the long back cap get in the way. The 300M Medium Back Cap is the perfect solution for those situations where you need a bit more clearance but don't want to cut your tungsten down to a stub for a short cap. This "Goldilocks" size is a favorite among pipe welders and fabricators who need versatility. It allows you to use a reasonably long piece of tungsten while shaving inches off the total length of your torch setup, giving you the maneuverability you need to make that perfect pass in a roll cage or exhaust manifold.

This high-quality generic replacement is designed to fit all standard 17, 18, and 26 series TIG torches. Whether you are running a classic Weldcraft WP-17 air-cooled torch in your garage or a heavy-duty water-cooled WP-18 in an industrial shop, this cap will thread right on. It comes complete with a fresh O-ring, ensuring that your shielding gas stays where it belongs—covering your weld pool—rather than leaking out the back of the handle. A leaky back cap is a common, often overlooked cause of porosity and poor arc starts; replacing worn or cracked caps with a fresh 300M is an easy maintenance step that keeps your welds clean.

Durability is key when it comes to torch parts. Made from tough, heat-resistant materials, this back cap can handle the reflected heat from high-amperage welding without warping or cracking prematurely. It features a knurled or textured grip surface, making it easy to tighten or loosen by hand, even when wearing TIG gloves. Don't let a broken or missing back cap stop your production. Stocking up on these essential consumables ensures you are always ready to weld. This part is compatible with most major brands, offering you the performance of the big names at a fraction of the cost.

Why Choose the 300M Medium Cap?

• Perfect Balance: Shorter than a long cap for better access, longer than a short cap to save tungsten.
• Universal Fit: Works with almost any 17, 18, or 26 style torch body.
• Gas Tight: Includes a high-quality O-ring to prevent gas leaks and porosity.
• Cost-Effective: Get the same performance as OEM parts for less.