Carriage Bolt Metric Neck Type Square Basic Material Steel Material Grade Class 4.6 Fastener Finish Zinc Plated Dia/Thread Size M8-1.25 Fastener Length 20 mm Fastener Thread Direction Right Hand Fastener Thread Type Metric Coarse DIN 603 Head Dia 19.35 to 20.65mm Head Height 4.88 mm Head Type Round Square Height 5.60mm Square Width 8.58mm Tensile Strength 58 000 psi Package Quantity 100