uxcell M2x4mm Thread Button Head Hex Socket Cap Screw Bolt 100pcs Drive Type: Hex Socket; Head Style: Socket Button Head; Material: 10.9 Alloy Steel Package Content: 100(+/-2%)pcs x Button Head Screws; Product Name: Button Head Screws; Thread Size: (Male)M2x4mm/0.08"x0.16"(D*L) Weight: 15g; Main Color: Black; Thread Pitch: 0.4mm Total Length: 5mm/0.2"; Head Diameter: 4mm/0.16" Hex Socket Width: 1mm/0.04"; Head Height(Approx): 2mm/0.08"