... required!3. Surface Treatment Options: Plain, Black, ZP, YZP, BZP, HDG, Nickle, Chrome, Dacromet, Cr3+,Cr6+4. Other Material Options for hex nut ... , etcIn Stock Hex Nut Available (below sizes only)M6, M8, M10, M12, M16, M20, M24Goods in Stock for immediately shipment! Both Carbon ...