Qualfast: M5 Knurled Thumb Nut Nylon PA (6.6) Knurled Thumb Nuts, Metric, Nylon PA (Plastic Polyamide) - Grade 6.6 MPN: M5 Knurled Thumb Nut Nylon PA (6.6) Attributes: Box Quantity: 100 Driving Features: Knurled Head Grade: PA 6.6 Length: 6mm Material: Plastic Surface Treatment: Plain System of Measurement: Metric Thread: Metric Thread Direction: Right Thread Size: M5