... , copper, alloyFinishPlating, Oxiding, Blasting, Painting, Anodizing, Heat treatment, AlodineTolerancehexagon socket screws: +0.0004/-0, +0/-0.0004 inchStandard DIN912,913 ... 8M (SS 316), B 8 T (SS 321), A 2, A 4Freeun produces custom hexagon socket screws per customers' drawings or ... we can quote you a price immediately.OEM, ODM hexagon socket screws are provided per customers' application. You name it ...