uxcell M3 x 8mm Alloy Steel Hex Socket Button Head Screws Black 100 Pcs Drive Type: Hex Socket; Head Style: Button Head; Material: Alloy Steel Package Content: 100(+/-2%) x Socket Button Head Screws; Product Name: Socket Button Head Screws Thread Size: M3 x 8mm; Weight: 52g Main Color: Black; Total Length: 10mm/ 0.4" Head Diameter: 5.5mm/ 0.22"; Hex Key Size: 2mm/ 0.08"