... alloyFinishPlating, Oxiding, Blasting, Painting, Anodizing, Heat treatment, AlodineTolerancehexagon socket screws: +0.0004/-0, +0/-0.0004 inchStandard DIN912, ... has the locking characteristic of both floating-head and countersunk screw. When used to assemble the complicated machines, it ... certified manufacturer – Freerun GroupStrict quality control for hexagon socket screws by IQC, IPQC, FQC, SPC, PCP, ...