Material: 12.9 Alloy Steel Metric M3 screws,Thread Length: M3 x 6mm，Thread Diameter: 3mm, Diameter of the head: 5.5mm (max); Height of the head: 3mm (max); Thread Pitch: 0.5mm,Total Length ( Including Head ): 9 mm,Thread Coverage: Full Thread Package: These 100 Pcs M3 x 6mm Hex Socket Head Cap Screws and 1 Pcs 2.5mm Hex Key Come In Plastic Storage Case widely used in a variety of industries such as construction, manufacturing, engineering, assembling, aircraft and so on.