... :stainless steel, carbon steel, aluminum 2.Size: M3-M12Inch Thread: UNC6-32~1/2-133..Finished: Zince, Nickel,etc.4. ... Specifications 1.StandardDIN, IFI, ASTM, ISO, JIS, BS and non-standard products2.Materialscarbon, low, mild, high strength, alloy and stainless steel3 ... Headdome and countersunk heads, large flange, multi-grip, and closed-end types4.Surfaceplain, black, white, yellow, zinc, hot dip ...