Product Review
✔ Meets/exceeds: DIN7991
✔ Screw Head Style: flat head, known as countersunk head, countersunk angle: 90 degree
✔ Screw drive style: hex socket, known as internal hex drives, hex Size: 2 mm
✔ 10.9 grade alloy steel, hardness: HRC 32-39, tensile strength: 1040 N/mm²
✔ Rust proof: black oxide finish covered with anti-rust oil
✔ Easy to store: these screws come in an easy-use separated girds storage case
Item----Thread Length----Total Length
M3 x 6--------4mm---------6mm
M3 x 8--------6mm---------8mm
M3 x 10-------8mm--------10mm
M3 x 12-------10mm-------12mm
M3 x 16-------14mm-------16mm
Package Contains:
M3 x 6 ------50 Pcs
M3 x 8 ------50 Pcs
M3 x 10-----50 Pcs
M3 x 12-----50 Pcs
M3 x 16-----50 Pcs
Total: 250 Pcs
About Hex Socket Drives:
 Hex Socket Drives, also known as Internal hex drives , have a hexagonal hole in the center that requires an Allen key, also known as a hex key or Allen wrench.
About Flat Head:
 Flat head is designed to fit flush to the surface when used with countersunk holes.