✔ Includes 100 Pcs M3 x 12mm Hex Socket Button Head Cap Screws , Thread Size ( Diameter ): 3 mm, Thread Pitch: 0.5 mm, Thread Length: 12 mm, Total Length ( Includes Head ) 13.53 mm, Screw Head Style: Button Head, Head Diameter: 5.50 mm, Head Height: 1.53 mm Screw Drive Style: Hex Socket Drive, also Known as Internal Hex Drive, Hex Size: 2.0 mm ✔ Material of Screws: Alloy Steel 40Cr, Black Oxide Finish; Strength Grade of Screws : 12.9 Grade, Hardness: HRC 39-44, Tensile Strength: 1220 N/mm² ✔ 1 Pcs Hex Key, Hex Size: 2.0 mm, to Drive These Screws Conveniently and Easily ✔ Material of Hex Key: Chrome-Vanadium Steel, Nickel Plated, Higher Strength, Anti-rust ✔ Package: 100 Pcs M3 x 12mm Hex Socket Button Head Cap Screws and 1 Pcs Hex Key Come In Plastic Storage Case, Organized Conveniently and Easily 【100 Pcs M3 x 12mm Hex Socket Button Head Cap Screws + 1 Pcs Hex Key Come In a Plastic Storage Box】
✔ Contains 100 Pcs M3 x 12mm hex socket button head cap screws
--Meets/exceeds: ISO7380
--Thread size ( diameter ): 3 mm
--Thread Pitch: 0.5 mm
--Thread Length: 12 mm ( Range: 12.00 ± 0.35 mm), Total Length ( includes head ): 13.53 mm ( Range: 13.53 ± 0.48 mm )
--Screw head style: button head, head diameter: 5.50 mm( Range: 5.50 ± 0.15 mm), Head Height: 1.53 mm ( Range: 1.53 ± 0.13 mm)
--Screw drive style: hex socket drive, also known as internal hex drive, hex size: 2.0 mm --Made of alloy steel 40Cr, black oxide finish, high strength and anti-rust
--Strength grade of screws : 12.9 Grade, hardness: HRC 39-44, tensile strength: 1220 N/mm²

✔ Contains 1 Pcs hex key to drive these screws conveniently and easily
--Hex size: 2.0 mm
--Made of chrome-vanadium steel, nickel plated, higher strength, anti-rust
✔ Easy to store: 100 Pcs M3 x 12mm hex socket button head cap screws and 1 Pcs Hex Key come in a plastic storage box, organized conveniently and easily

[ Package Contains ]
M3 x 12mm-----100 Pcs
Hex Key------1 Pcs

[ What is Hex Socket Drive ]
Hex Socket Drive, also known as Internal hex drive, have a hexagonal hole in the center that requires an Allen key, also known as a hex key or Allen wrench
[ What is Button Head ]
Button head is similar to standard pan head screws but have a curved top