... Sand Casting Pump Inlet Flange Grey Iron Checked by Go&no go gauge 4"NPT thread Machined by CNC and NC Machine Sand ... Casting Pump Inlet FlangeGrey IronChecked by Go&no go ... Iron etc.2) Process: Investment Casting, Sand Casting (Resin Sand Casting, Green Sand Casting), Permanent Casting, Die Casting, ... ,BS, JIS, UNI, ANSI, ISO etc. Sand Casting Pump Inlet Flange