Countersunk Washer Material Grade/Class 18-8 Material Stainless Steel Finish Plain For Screw Size M6 Maximum Inside Diameter 6.4 mm Outside Diameter 18 mm Countersink Angle 90 Degrees Overall Height 3.3 mm System of Measurement Metric For Use With Flat and Oval Head Countersunk Screws Pack Size Small Pack Package Quantity 5