... , brass, copper, alloyFinishPlating, Oxiding, Blasting, Painting, Anodizing, Heat treatment, AlodineTolerancehexagon socket screws: +0.0004/-0, +0/-0.0004 inchStandard DIN912,913 ... by ISO certified manufacturer – Freerun GroupStrict quality control for hexagon socket screws by IQC, IPQC, FQC, SPC, PCP, PPAP to provide ... to ask for catalogues and price list. Top Quality Hexagon Socket Head Cap Screw