Qualfast: M8 Knurled Thumb Nut High BZP (5) Knurled Thumb Nuts Metric Steel - Grade 5 - BZP (Bright Zinc Plated) DIN 466 MPN: M8 Knurled Thumb Nut High BZP (5) Attributes: Box Quantity: 25 Driving Features: Knurled Head Grade: 5 Leading Standard: DIN 466 Length: 18mm Material: Steel Standards Met: DIN 466 Surface Treatment: Zinc Plated System of Measurement: Metric Thread: Metric Thread Direction: Right Thread Size: M8