Detailed Product Description Din 315, ASNE B18.6X(type A, B, C, D). Metric size: from M 3 to M 24. Inch size: from 1/4 to 3/4.Material: carbon steel, zinc alloy, stainless steel.Surface: zinc plated, yellow zinc plated, black zinc plated, nickel plated, brass coating, hot-dip galvanization, dacromet.