iExcell 250 Pcs M3 x 6mm/8mm/10mm/12mm/16mm 10.9 Grade Alloy Steel Hex Socket Button Head Cap Screws Kit, Black Oxide Finish;

✔ Screw Head Style: Button; Screw Drive Style: Hex Socket , Known as Internal Hex Drives
✔ Head Diameter: 5.5mm /0.22"; Head Height: 1.6mm /0.06";Thread Size: 3mm;Thread Pitch: 0.5mm
✔ Alloy Steel, Black Oxide Finish; 10.9 Grade Tensile Strength
✔ Easy to Store: These screws Come in an easy-use storage case

Item---------Thread Length------Total Length
M3 x 6---------6mm/0.24"--------7.6mm/0.30"
M3 x 8---------8mm/0.31"--------9.6mm/0.38"
M3 x 10-------10mm/0.39"-------11.6mm/0.46"
M3 x 12-------12mm/0.47"-------13.6mm/0.54"
M3 x 16-------16mm/0.63"-------17.6mm/0.69"

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 Button Head
 Button head is similar to standard pan head screws but have a curved top