Qualfast: M12 Lock Nut N/M Insert Z&Y (8) Hexagon Lock Nut Metric Steel - ZY (Zinc Yellow Passivated) Prevailing Torque Type Nylon Insert Grade 8 DIN 985 MPN: M12 Lock Nut N/M Insert Z&Y (8) Attributes: Box Quantity: 100 Driving Features: Hexagon Grade: 8 Leading Standard: DIN 985 (1987) Material: Steel Nut Type: Nylon Insert Surface Treatment: Zinc Plated Yellow Passivated Thread: Metric Thread Direction: Right Thread Size: M12