Machine Screw thread 00-90 (0.052”) head diameter 2.5mm / 0.098" Overall length is 8.8mm / 0.346". Material: nickel silver a premium copper alloy resistant to tarnish often used in Jewelry and eye wear part color is silver. Parts packaged per 100 pieces with bulk pricing available. Matting hex nut # 11120. Please note this has an over-sized thread major of .052" vs the standard thread major of .046".