Metric Socket Head Cap Screw Head Type Standard Material Alloy Steel Blue Finish Thread Size 0.50mm Drive Type Hex Socket Drive Size 17mm Thread Type Fine Thread Style Fully Threaded Thread Direction Right Hand Length under Head 70mm Thread Length 70mm Head Height 20mm Thread Dia M20 Head Dia 30mm Rockwell Hardness C38 to C44 Min Tensile Strength 1220N psi Meets/Exceeds ASTM A574M and ANSI/ASME B 18.3.1M Package Quantity 5