Description M3 nuts have a diameter of 3 mm. Hex nuts are one of the most common nuts available and are used with anchors, bolts, screws, studs, threaded rods and on any other fastener that has machine screw threads Specifications: Example – M2*4 = thread diameter 2mm* Length 4mm Nut: M3 Washer: M3 Packing List: 20x M3 x 5 20x M3 x 6 20x M3 x 8 20x M3 x 10 20x M3 x 12 20x M3 x 14 20x M3 x 16 20 x M3 x 18 20x M3 x 20