M8 Flat Washer, 304 Stainless Steel, 8mm ID, 16mm OD, 1.6mm Thickness, Plain Finish, for Bolt and Screw (Pack of 150) : Amazon.ca: Tools & Home Improvement
Steel Flat Washer, Zinc Plated Finish, DIN 125, Metric, M8 Screw Size, 8.4 mm ID, 16 mm OD, 1.6 mm Thick (Pack of 100) : Amazon.ca: Tools & Home Improvement