... copper, alloyFinishPlating, Oxiding, Blasting, Painting, Anodizing, Heat treatment, AlodineTolerancehexagon socket screws: +0.0004/-0, +0/-0.0004 inchStandard DIN912,913 ... we can quote you a price immediately.OEM, ODM hexagon socket screws are provided per customers' application. You name it ... however, a dish-shape installation hole at 900 has to be made.SIZE LIST:Hex Socket Button Head Cap Screws ( ...