Qualfast: M8 Hex Dome Cap Nut High (6) Hexagon Dome Nut - High Type, Metric, Steel - Grade 6, DIN 1587 (1987). MPN: M8 Hex Dome Cap Nut High (6) Attributes: Box Quantity: 250 Driving Features: Hexagon Grade: 6 Material: Steel Surface Treatment: Plain Thread: Metric Thread Direction: Right Thread Size: M8