M3 M4 M5 M6 M8 M10 M12 M16 M20 MARINE GRADE A4 Stainless FORM A Flat Washers 316
These are a DIN 125 A. Further details are as follows 316 Stainless Round Bar. Cup Washers. Imperial Flat & Spring Washers. BA Stainless Flat Washers. Spring Washers. Flat Washers.