Qualfast: M12 Hex Slotted/Castle Nut BZP (5) Hexagon Slotted And Castle Nut Metric Steel - Grade 5 - BZP (Bright Zinc Plated) DIN 935-1 MPN: M12 Hex Slotted/Castle Nut BZP (5) Attributes: Box Quantity: 100 Dimensions P: 1.75 Dimensions m: 15 Dimensions n: 3.5 Dimensions s: 19 Driving Features: Hexagon Grade: 5 Material: Steel Number of Slots: 6 Supplied In: 100 Surface Treatment: Zinc Plated Thread: Metric Thread Direction: Right Thread Size: M12