... SS304, SS316, Brass nut Size from M3 to M36 Carbon Steel Serrated Hex Flange NutMetric Sizes Regular Supply M5, M6, M8 ... BZP, HDG, Nickle, ChromeOther Material Options for hex nut:Stainless Steel SS201, SS301, SS304, SS316Grade A2-70. A4-80Other Material available ... Both Carbon Steel and SS304 A2-70Bulk pack, poly pack, small box, color box, blister card options Carbon Steel zinc plated serrated Hex ...