Content with Form A Washer

22 September 2016
Nominal size Inside diameter (d1) Outside diameter (d2) Thickness (s) min. BS 4320 max. DIN 125-1 max. BS 4320 min. BS 4320 max. DIN 125-1 min. DIN 125-1 max. min. max. M5 5.3 5.5 5.48 9.7 10 9.64 10 0.9 1.1 M6 6.4 6.7 6.62 12.1 12.5 11.57 12 1.4 1.8 M8 8.4 8.7 8.62 16.6 17 15.57 16 1.4 1.8 M10 10.5 10.9 10.77 20.5 21 19.48 20 1.
Read more about BS 4320 / DIN 125-1 Basic dimensions Form A washers for selected sizes