Extra Thick Oversized Washer, Flat Washer Type Standard, Dimensional Standards Not Applicable, Material Alloy Steel, Material Grade/Class Not Applicable, Finish Plain, For Screw Size M16, Inside Diameter 17.52 mm, Outside Diameter 32 mm, Maximum Thickness 3.1 mm, System of Measurement Metric, Minimum Thickness 3.1 mm, Color Blue, Material Quality Standards Not Applicable, Pack Size Small Pack, Rockwell Hardness RC38, RoHS Compliant RoHS Compliant, Package Quantity 5