uxcell M2x16mm 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: 30pcs x Button Head Screws; Product Name: Button Head Screws; Thread Size: (Male)M2x16mm/0.08"x0.63"(D*L) Weight: 37g; Main Color: Black; Thread Pitch: 0.4mm Total Length: 18mm/0.7"; Head Diameter: 4mm/0.16" Hex Socket Width: 1mm/0.04"; Head Height(Approx): 1.5mm/0.06"