M3 x 8mm Alloy Steel Hex Bolt Socket Head Cap Screws Black 100 Pcs Product Name : Socket Head Cap Screws;Material : 12.9 Grade Alloy Steel;Color : Black Screw Standard : M3 x 8mm;Thread Dia. : 3mm Thread Pitch : 0.5mm;Thread Length : 8mm / 0.3" Head Diameter : 5.5mm;Head Height : 3mm Weight : 74g;Package Content : 100(+/-2%) x Socket Head Cap Screws