IS 2232 1967 Castle Nuts IS 2232 1967IS- 5368 1969 Unit mm Sized d2 w m n s Size of Split Pin Max Min Max Min Max Min Nominal Nominal M12 X 1.25 17.0 16.57 15.0 14.57 10.0 9.42 3.5 19.0 3.2 M12 X 1.25 17.0 16.57 10.0 9.64 6.0 5.52 3.5 19.0 3.2 M14 X 1.50 19.0 18.48 16.0 15.57 11