This oxygen flashback arrestor with a 3/8 in (9.5 mm) right-hand nut is a compact safety device for oxy-fuel systems used in welding, brazing, and cutting. Supplied as a single unit. MPN: 200 194. Use in oxy-fuel welding, cutting, heating, and brazing systems to protect regulators, hoses, and torches from flashback.
eBay