Specification: Model: MXSH3;  Material: 304 stainless steel;  Color: Silver;  Screw Drive Type: Hex Socket;  Screw Head Type: Buttont Head;  Box Size (L*W*H): 13.2x7.2x2.3cm;     Features: - Made of 304 stainless steel, ensure its high hardness and corrosion resistance, anti-rust and durable in many environments.  - M3, M4, M5 thread with many common lengths that you can use for general purpose.  - The length of hex socket screw is measured from underneath the head to the flat of the point.  - These screws and nuts will be great replacement for industrial and construction fasteners.  - Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry.  - Comes with a delicate plastic organizer box for storage, also suitable for collecting your small accessories.     Package Included: Type Length Quantity;  M3 Screw 8mm 20;  M3 Screw 12mm 20;  M3 Screw 16mm 20;  M3 Screw 20mm 20;  M4 Screw 8mm 20;  M4 Screw 12mm 20;  M4 Screw 16mm 20;  M4 Screw 20mm 20;  M5 Screw 8mm 15;  M5 Screw 12mm 15;  M5 Screw 16mm 15;  M5 Screw 20mm 15;  M3 Nut - 80;  M4 Nut - 80;  M5 Nut - 60;  Total Quantity: 440