... 3.SGS,Rohs certification 4.material: stainless steel,carbon steel DIN 912 stainless steel hexagon socket cap screw A2-50 1 ... . G. ) etc.Heat TreatmentTempering,Hardening,Spheroidizing,Stress Relieving.StandardISO,GB,DIN,JIS,ANSI,BSWManufacture ProcessHeading/washer assembly/Threading/Secondary machine/heat ... choose our screw,they are:1.Standard of screw:JIS/DIN/ANSI/BSW. 2.Size of screw:M2-M8.3.Material ...