Bolt Base (3mm) M3 x 8 Black 10.9 Grade High Tensile Hex Socket Countersunk screws Self Colour Allen Bolts DIN 7991 - 30 Pack 10.9 Grade High Tensile Steel, Black (Self Colour) Socket Countersunk - DIN 7991 3mm Metric Thread, M3 - 0.5mm Pitch Length - 8mm Including Head Ideal For High Stress Applications Or For When a High Strength Fastener Is Required