Grainger offers a variety of gas welder fittings to help you find the right ones for your welder. Find torch and regulator quick disconnects with automatic shutoff for safety. Durable brass check valves can close immediately for total shutoff if reverse gas flow starts. Flashback arrestors feature built-in check valves that can prevent reverse flow of gases. Stainless steel elements can extinguish flashback fire. Shop Grainger's selection of high-quality gas welder fittings today!