M3 x 45 Alloy Steel Hex Bolt Socket Head Cap Machine Screw Black 50Pcs Product Name : Socket Head Cap Screws;Material : 12.9 Grade Alloy Steel;Color : Black Screw Standard : M3 x 45;Thread Dia. : 3mm;Thread Pitch : 0.5mm Thread Length : 45mm / 1.8";Head Diameter : 5.5mm Head Height : 3mm;Hex KeySize : 2.5mm Weight : 115g;Package Content : 50(+/-2%) x Socket Head Cap Screws