... , alloyFinishPlating, Oxiding, Blasting, Painting, Anodizing, Heat treatment, AlodineTolerancehexagon socket screws: +0.0004/-0, +0/-0.0004 inchStandard DIN912,913 ... certified manufacturer – Freerun Group Strict quality control for hexagon socket screws by IQC, IPQC, FQC, SPC, PCP, PPAP ... be supplied with different finish, such as bright, zinc plated, black 4) Can be made with different standards, such ...