Features [High quality material] This metrics machine screw is made of 12.9 grade alloy steel material, the surface is oxidized, and it has good extension strength and corrosion resistance in many environments. [Easy to use] The cap of the m3 machine screw can be driven where there is not enough space to accommodate the wrench. [Ideal choice] Ideal choice for confined areas that need to be flush or below the surface. [Scope of application] This machine screw is widely used in household and office equipment, communication equipment, ship assembly or other machinery industries. [Easy to carry] The screws and nuts are installed in 10 compartments and in a transparent plastic box for convenient use and storage. Specifications: Material: 12.9 Grade Alloy Steel Color: Black Screw Thread Lengths: 4mm(20Pcs), 5mm(20Pcs), 6mm(20Pcs), 8mm(20Pcs), 10mm(20Pcs), 12mm(20Pcs), 16mm(20Pcs), 20mm(20Pcs), 25mm(20Pcs) Thread Diameter: 3mm (M3) Box Size: 13 * 6.5 * 2.3cm / 5 * 2.6 * 0.9inch Quantity: 1 x Box of 180Pcs Screws + 100Pcs Nuts Package Weight: 228g Type: Cap Head Hex Socket Screw Function: Fastener  Package Includes: 180 x Screws 100 x Nuts Note: 934 on the box lable is abbreviated from DIN934, which means cap head hex socket nut. Package List