M4 Stover All Metal Self Locking Nuts Grade 8 BZP Grade 8 Vibration resistant self locking nuts which derive their torque characteristics from controlled distortion of their top threads. MPN: M4 Stover All Metal Self Locking Nuts Grade 8 BZP Attributes: Box Quantity: 200 Driving Features: Hexagon Grade: 8 Material: Steel Nut Type: Stover Surface Treatment: Zinc Plated Thread: Metric Thread Direction: Right Thread Size: M4