Carbon Steel Cap, Carbon Steel Concentric Reducer, Sockolet manufacturer / supplier in China, offering Factory Price ASTM A193 Gr. B7m Black Heavy Hex Bolts, BMI Professional Manufacture Malleable Iron Threaded Fittings Black Round Pipe End Caps for HAVC System, Stainless Steel 304 Oval Head Pipe Cap Plug for Fittings SS304 Cap Butt-Weld End Cap Unpolished 304 & 316L and so on.