... Plug,forged pipe fittings4.specification:7/8'' Casting: investment casting ,precision casting, lost wax casting ,soluble glass process complex shell process.Materials: stainless ... , ASTM, BS,JCSI.Piece numbers: small, medium and large series.Process: cast, machining, turning, milling, drilling, thread cutting.Surface treatment: ... Quality control: According to ISO 9001 2001 Bullet End Plug,pipe fitting