Weldcraft 300M Medium Back Cap for 17/18/26 Series Torches (2-Pack)

Genuine Weldcraft 300M Medium Back Caps – 2 Pack

Keep your TIG torch performing at its peak with this 2-pack of genuine Weldcraft 300M Medium Back Caps. Whether you are a professional fabricator or a serious hobbyist, you know that the quality of your consumables directly impacts the quality of your weld. The back cap might seem like a simple plastic part, but it plays a huge role in your torch's performance. It secures your tungsten in place and, more importantly, seals the back of the torch to prevent shielding gas from leaking out or air from being sucked in. A cracked or worn-out back cap is a common cause of mysterious porosity issues and erratic arcs.

The "Medium" size of the 300M is a favorite among TIG welders who need versatility. Sometimes the standard long cap is just too big to fit inside a roll cage or an exhaust manifold, but you don't want to cut a brand-new piece of tungsten in half just to use a short cap. The medium cap is the perfect middle ground—it gives you better clearance than the long cap but still holds a decent length of tungsten, saving you money on electrodes in the long run. It is designed to fit the industry-standard "Big Series" torches, including the air-cooled WP-17 and WP-26, and the water-cooled WP-18.

When you buy Weldcraft (now Miller Weldcraft), you are buying the brand that set the standard for TIG torches. These caps are made from durable, high-temperature materials that resist cracking when dropped or exposed to high heat. Each cap includes a fresh O-ring to ensure a perfect, airtight seal right out of the package. Don't let a $5 part ruin a critical weld or stop your production line. Stock up with this convenient 2-pack and ensure your torch is always ready for the next job. Compatible with Miller, Lincoln, ESAB, and CK torches that utilize the 17/18/26 series form factor.