uxcell M4x30mm Thread Button Head Hex Socket Cap Screw Bolt 50pcs Drive Type: Hex Socket; Head Style: Socket Button Head; Material: 10.9 Alloy Steel Package Content: 50(+/-2%)pcs x Button Head Screws; Product Name: Button Head Screws; Thread Size: (Male)M4x30mm/0.16"x1.2"(D*L) Weight: 123g; Main Color: Black; Thread Pitch: 0.7mm Total Length: 32mm/1.3"; Head Diameter: 7mm/0.28" Hex Socket Width: 2.5mm/0.1"; Head Height(Approx): 2mm/0.08"