... 304, 3162. Surface: mirror polish, high polished3.Name:Bullet End Plug,forged pipe fittings4.specification:7/8'' Casting: investment casting ... . 3-coorcdinate. Computerised numerical. Control measuring ,machining ,pressure inspection up to 200bars ,mechanical values for tensile strength. ,yield stress ,notched ... ray,metallograph.Quality control: According to ISO 9001 2001 Bullet End Plug,pipe fitting