Steel Flat Washer, Zinc Plated Finish, DIN 125, Metric, M20 Screw Size, 21 mm ID, 37 mm OD, 3 mm Thick (Pack of 25): Amazon.com: Industrial & Scientific
M20 Pack of 1 Washers DIN 125 ISO 7089 Low Galvanised Alloy Steel Washers U Mudguard Body Washers Plain Wide Round for Screws (21 mm x 37 mm) : Amazon.de: DIY & Tools
Amazon.com: M20 Din 125 A Metric Flat Washer 18 8 Stainless Steel (Pack Qty 400) BC-M20D125A188 by Shorpioen : Industrial & Scientific
Metric Flat Washer, Stainless Steel DIN 125A (125 A) 18-8 / A2