Description Screws Standard: This kit is a metric machine screw. The nominal diameter is M3, indicating that their screw diameter is M3. The thread pitch is 0.5mm, which means that the axial distance between the two adjacent teeth on the thread on the middle diameter line is 0.5mm.Stainless Steel Material: All made of 304 stainless steel material. Because the material has the characteristics of anti-rust and corrosion resistance, it can be used for a long time in the dark and damp or outdoor.Assortment Packing Box: All nuts and bolts are stored separately according to the grid, and the size and quantity of each specification are marked in detail. The box of the kit is made of PVC material, and the plastic packaging material is also reinforced on the outside of the box, so you dont have to worry about messing up.Wide Range of Applications: M3 small screw assortment is widely used. Commonly used in home improvement, sewing machine screws, 3D printers, car maintenance, computer motherboard standoffs and SSD, daily work and DIY.Head Style: Hex CapColour:SilverMaterial:304 stainless steelPackage Contents:50 x M3 x 4mm Screw50 x M3 x 6mm Screw50 x M3 x 8mm Screw50 x M3 x 10mm Screw30 x M3 x 12mm Screw30 x M3 x 16mm Screw30 x M3 x 18mm Screw30 x M3 x 20mm Screw25 x M3 x 25mm Screw25 x M3 x 30mm Screw250 x M3 Nuts1 x WrenchOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.