Bolt Base (8mm) M8 x 20 Black 12.9 Grade High Tensile Hex Socket Cap screws Self Colour Allen Bolts DIN 912 - 20 Pack 12.9 Grade High Tensile Steel, Black (Self Colour) Socket Cap screws - DIN 912 8mm Metric Thread, M8 - 1.25mm Pitch Length - 20mm Excluding Head Ideal For High Stress Applications Or For When a High Strength Fastener Is Required