Specification: Model: M3SH8;  Material: 304 stainless steel;  Color: Silver;  Screw Drive Type: Hex Socket;  Screw Head Type: Buttont Head & Flat Head;     Features: - Made of 304 stainless steel, ensure its high hardness and corrosion resistance, anti-rust and durable in many environments.  - M3 thread with two different head types and many common lengths that you can use for general purpose.  - The length of a flat socket head cap screw is measured from the top of the head to the flat of the point, unlike other socket products (button head) whose length measurement is 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: Item Head Type Length Quantity;  M3 Screw Button Head 4mm 100;  M3 Screw Button Head 6mm 80;  M3 Screw Button Head 8mm 70;  M3 Screw Button Head 10mm 60;  M3 Screw Button Head 12mm 50;  M3 Screw Flat Head 4mm 100;  M3 Screw Flat Head 6mm 80;  M3 Screw Flat Head 8mm 70;  M3 Screw Flat Head 10mm 60;  M3 Screw Flat Head 12mm 50;  Total Quantity: 720.