The H-935 is a two-piece adapter kit manufactured by TRW. It is designed to retrofit ANSI flanges up to 3 inches (76.20 mm) in size. The kit is made of corrosion-resistant 316 stainless steel, and is ANSI 150 rated for pressure. The kit contains two pieces – an adapter and a blind flange with integral orifice. The orifice can be used to gauge pressure or flow when connected to a piping system. In addition, the kit includes a gasket and screws for mounting. The H-935 can be used in many common applications including air and watertight seals, pipe protection, and hydraulic and pneumatic systems.