21521 - ESAB R-72 Regulator Bonnet Cap Replacement

Keep Your R-72 Regulator Running Safely

Your gas regulator is the heart of your oxy-fuel setup, and the R-72 series is known for being one of the toughest out there. However, even the best equipment takes a beating in the shop. If your regulator cap has been dented, the threads are stripped, or it shows signs of cracking, it is time to replace it immediately with the ESAB 21521 Regulator Cap. This isn't just a cosmetic cover; it's the component that holds the tension on your adjusting spring. A damaged cap can make it impossible to set your pressure correctly or, worse, create a safety hazard.

We know that when a regulator goes down, your torch stays cold, and work stops. That's why we stock genuine replacement parts like the 21521. Designed specifically for the R-72, this cap screws on perfectly without binding, restoring the smooth action of your pressure adjusting screw. Because it is a genuine ESAB part (the makers of the R-72), you don't have to worry about it not fitting or being made of inferior metal that might fail under load. It restores your gear to factory condition, giving you the confidence that your pressure settings will hold steady while you focus on laying down the perfect bead or making a clean cut.

Installation is straightforward for those experienced in equipment repair. Simply depressurize the system completely, remove the adjusting screw, unscrew the old cap, and thread the new one in place. It’s a small investment that extends the life of your expensive regulator and keeps your shop safe. Don't risk using damaged gas equipment; grab a fresh cap and keep your R-72 working as hard as you do.