Lock Nut, Dimensional Standards DIN 980, Finish Zinc Plated, Hex Height 20 mm, Hex Type Standard Hex Top Lock, Hex Width 30 mm, Lock Type Top Lock Distorted Thread, Material Steel, Material Grade/Class Class 8, Minimum Yield Strength 153,700 psi, Pack Size Small Pack, Rockwell Hardness RC 26/36, System of Measurement Metric, Thread Direction Right Hand, Thread Pitch 2.5 mm, Thread Size M20-2.50, Package Quantity 10