... steel or ductile iron CNC machining, powder coating, custom fabrication,OEM service Product description1. product name: npt ... core casting, CNC machining, powder coating4. quality control: QC inspection, hydraulic test Certificationequipmentfeatures ISO9001 2008imported HASS 4 axis ... mchine, grinding machine and relevant test facilities etc.custom fabrication, OEM service NPT thread, Valve body, CNC ...