Lock Nut Finish Zinc Plated Hex Height 17 1/2 mm Hex Type 2-Piece Wedge Hex Width 19 mm Lock Type 2-Piece Wedge Material Steel Material Grade/Class Class 10 Pack Size Small Pack Rockwell Hardness HRC30-34 System of Measurement Metric Thread Direction Right Hand Thread Pitch 1.75 mm Thread Size M12-1.75 Package Quantity 50