uxcell M3 x 4mm Hex Bolt Socket Head Cap Machine Screws Black 100 Pcs Product Name : Socket Head Cap Screws;Material : 12.9 Grade Alloy Steel;Color : Black Screw Standard : M3 x 4mm;Thread Dia. : 3mm Thread Pitch : 0.5mm;Thread Length : 4mm Head Diameter : 5.5mm;Head Height : 3mm Weight : 57g;Package Content : 100(+/-2%) xSocket Head Cap Screws