Small Parts Brass Flat Washer, Plain Finish, DIN 125, Metric, M4 Screw Size, 4.3 mm ID, 9 mm OD, 0.8 mm Thick (Pack of 100): Amazon.com: Industrial & Scientific
Steel Flat Washer, Zinc Plated Finish, DIN 125, Metric, M6 Screw Size, 6.4 mm ID, 12 mm OD, 1.6 mm Thick (Pack of 100): Amazon.com: Industrial & Scientific
5/16" inch (9mm ID x 17.5mm OD) Stainless Steel Flat Washer, 304 Stainless Steel
Amazon.com: TIMco WA20Z DIN 125 Form A Washer M20 - Zinc Plated (Box of 100) : 工業與科學