Qualfast: M30 Hex Slotted/Castle Nut (4) Hexagon Slotted And Castle Nut Metric Steel -Grade 4 DIN 935 1 MPN: M30 Hex Slotted/Castle Nut (4) Attributes: Box Quantity: 1 Dimensions P: 3.5 Dimensions m: 33 Dimensions n: 7 Dimensions s: 46 Driving Features: Hexagon Grade: 4 Material: Steel Number of Slots: 6 Supplied In: Pack of (1) Surface Treatment: Plain Thread: Metric Thread Direction: Right Thread Size: M30