EU 1661 Hexagon nuts with flange

Equivalent Standards

EU 1661

Dimensions for EU 1661 Hexagon nuts with flange

Thread size p c da dc dw e m m s r
min min max max min min max min min Nominal = max min max
M5 - - 0.8 1 5 5.75 11.8 9.8 8.79 5 4.7 2.2 8 7.78 0.3
M6 - - 1 1.1 6 6.75 14.2 12.2 11.05 6 5.7 3.1 10 9.78 0.36
M8 M8x1 - 1.25 1.2 8 8.75 17.9 15.8 14.38 8 7.6 4.5 13 12.73 0.48
M10 M10x1.25 M10x1 1.5 1.5 10 10.8 21.8 19.6 16.64 10 9.6 5.5 15 14.73 0.6
M12 M12x1.5 M12x1.25 1.75 1.8 12 13 26 23.8 20.03 12 11.6 6.7 18 17.73 0.72
M14 M14x1.5 - 2 2.1 14 15.1 29.9 27.6 23.36 14 13.3 7.8 21 20.67 0.88
M16 M16x1.5 - 2 2.4 16 17.3 34.5 31.9 26.75 16 15.3 9 24 23.67 0.96
M20 M20x1.5 - 2.5 3 20 21.6 42.8 39.9 32.95 20 18.9 11.1 30 29.16 1.2