Flat Washer Flat Washer Type Standard Dimensional Standards DIN 125A Material Stainless Steel Material Grade/Class 316 Finish NL-19 For Screw Size M12 Inside Diameter 13 mm Outside Diameter 24 mm Maximum Thickness 2.5 mm System of Measurement Metric Minimum Thickness 2.5 mm Color Silver Pack Size Small Pack Resistance Properties Corrosion Resistant Thickness Tolerance +/-0.20mm Package Quantity 25