M4 M5 M6 M8 M10 M12 M16 M20 FORM C Flat Washers A2 Stainless Steel Wider Large
These are a BS4320 C. Further details are as follows A2 Mixed Sets. Cup Washers. Imperial Flat & Spring Washers. BA Stainless Flat Washers. Spring Washers. Steel Fasteners.