iexcell 100 Pcs M4 x 20mm Thread Pitch 0.7 mm Alloy Steel 12.9 Grade Hex Socket Flat Head Cap Screws Bolts Kit for Screw Fix, Black Oxide Finish

✔ Includes 100 Pcs M4 x 20mm Hex Socket Flat Head Cap Screws , Thread Size ( Diameter ): 4 mm, Thread Pitch: 0.7 mm, Total length ( Includes Head ): 20 mm, Thread Length: 17.7 mm, Screw Head Style: Flat Head, Known as Countersunk Head, Countersunk Angle: 90 degree, Head Diameter: 7.82 mm, Head Length: 2.3 mm Screw Drive Style: Hex Socket Drive, also Known as Internal Hex Drive, Hex Size: 2.5 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: 2.5 mm, to Drive These Screws Conveniently and Easily ✔ Material of Hex Key: Chrome-Vanadium Steel, Nickel Plated, Higher Strength, Anti-rust ✔ Package: 100 Pcs M4 x 20mm Hex Socket Flat Head Cap Screws and 1 Pcs Hex Key Come In Plastic Storage Case, Organized Conveniently and Easily