Metric Socket Head Cap Screw Head Type Standard Material 12.9 Alloy Steel Black Finish Thread Size 0.70mm Drive Type Hex Socket Drive Size 3mm Thread Type Fine Thread Style Partially Threaded Thread Direction Right Hand Length under Head 30mm Thread Length 20mm Head Height 4mm Thread Dia M4 Head Dia 7mm Rockwell Hardness C39 to C44 Min Tensile Strength 176 900 psi Meets/Exceeds DIN 912 ISO 4762 Package Quantity 100