Qualfast: M20X1.00 Slotted Round Locknut N/M Insert Z&Y Lock Nuts - Slotted Round With Non-Metallic Insert Metric Steel - Z&Y (Zinc Yellow Passivated) MPN: M20X1.00 Slotted Round Locknut N/M Insert Z&Y Attributes: Box Quantity: 10 Dimensions B: 4 Dimensions D2: 32 Dimensions H: 9.4 Dimensions t: 2.5 Driving Features: Round Material: Steel Number of Slots: 4 Supplied In: Pack of 10 Surface Treatment: Zinc Plated Yellow Passivated Thread: Metric Fine Thread Direction: Right Thread Size: M20