54N21 - ESAB 54N21 Large Gas Lens Insulator for 17/18/26 TIG Torches

Upgrade Your TIG Setup with the 54N21 Insulator

Are you looking to improve your TIG welding results with better gas coverage? If you are upgrading your WP-17, WP-18, or WP-26 torch to use a Large Diameter Gas Lens, you need the right parts to make it fit. The ESAB 54N21 Large Gas Lens Insulator is the specific gasket required to bridge the gap between your torch handle and the large gas lens collet body. Without this specific insulator, your gas lens simply won't seal or fit correctly.

Made from durable, heat-resistant Teflon, this insulator (sometimes listed as a casing fuse) acts as a barrier to prevent electricity from arcing where it shouldn't. It also creates an airtight seal that forces your shielding gas through the lens screen, giving you that smooth, laminar flow that welders love. This means less turbulence, better puddle visibility, and cleaner welds on materials like stainless steel and aluminum.

Don't let a worn-out or incorrect insulator ruin your weld quality. The 54N21 is a small but mighty part of your torch assembly. Whether you are a professional fabricator or a serious hobbyist, keeping a few of these spares in your kit ensures you are always ready to tackle jobs requiring superior shielding gas coverage. Compatible with all major brands of 17/18/26 series torches, this ESAB insulator is the reliable choice for your high-performance torch setup.