... ISO9001:2008 and SGS certification.Different Shape Precision Stamping Parts Spell points: Detailed Discriptions (Payment Terms/Shipment Terms/ ... (H. D. G. ) etc.Heat TreatmentTempering,Hardening,Spheroidizing,Stress Relieving.StandardISO,GB,DIN,JIS,ANSI,BSWManufacture ProcessHeading/washer assembly ... of 100%,and have 18 month warranty. After sales service we will follow up goods for every customer and ...