DIN 1587

DIN 1587 Cap Nut
Thread Pitch Diameter Across
Flat		 Across
Corner		 Thickness Hex
Thickness		 Drill Depth Radius Undercut
d p da dk dw s e h m t w r x2 (max) g2 (max)
Series 1 Series 2 Series 3 min max max min nom
(max)		 min
A		 min
B		 A B max min
A		 min
B		 max min min max min Series 1 Series 2 Series 3 Series 1 Series 2 Series 3
M4 0.7 - - 4 4.60 6.50 5.80 7 6.78 6.64 7.66 7.50 8 7.64 7.42 3.2 2.90 5.26 5.74 2 3.25 1.4 - - - - -
M5 0.8 - - 5 5.75 7.50 6.80 8 7.78 7.64 8.79 8.63 10 9.64 9.42 4.0 3.70 7.21 7.79 2 3.75 1.6 - - - - -
M6 1 - - 6 6.75 9.50 8.30 10 9.78 9.64 11.05 10.89 12 11.57 11.30 5.0 4.70 7.71 8.29 2 4.75 2.0 - - - - -
M8 1.25 1 - 8 8.75 12.50 11.30 13 12.73 12.57 14.38 14.20 15 14.57 14.30 6.5 6.14 10.65 11.35 2 6.25 2.5 2.0 - - -
M10 1.5 1 1.25 10 10.80 15.00 14.30 16 15.73 15.57 17.77 17.59 18 17.57 17.30 8.0 7.64 12.65 13.35 2 7.50 3.0 2.0 2.50 - - -
M10 1.5 1 1.25 10 10.80 16.00 15.30 17 16.73 16.57 18.90 18.72 18 17.57 17.30 8.0 7.64 12.65 13.35 2 8.00 3.0 2.0 2.50 - - -
M12 1.75 1.5 1.25 12 13.00 17.00 16.20 18 17.73 17.57 20.03 19.85 22 21.48 21.16 10.0 9.64 15.65 16.35 3 8.50 - - - 6.4 5.6 4.9
M12 1.75 1.5 1.25 12 13.00 18.00 17.20 19 18.67 18.48 21.10 20.88 22 21.48 21.16 10.0 9.64 15.65 16.35 3 9.00 - - - 6.4 5.6 4.9
(M14) 2 1.5 - 14 15.10 20.00 19.20 21 20.67 20.16 23.35 22.78 25 24.48 24.16 11.0 10.30 17.65 18.35 4 10.00 - - - 7.3 5.6 -
(M14) 2 1.5 - 14 15.10 21.00 20.20 22 21.67 21.16 24.49 23.91 25 24.48 24.16 11.0 10.30 17.65 18.35 4 10.50 - - - 7.3 5.6 -
M16 2 1.5 - 16 17.30 23.00 22.20 24 23.67 23.16 26.75 26.17 28 27.48 27.16 13.0 12.30 20.58 21.42 4 11.50 - - - 7.3 5.6 -
(M18) 2.5 1.5 2 18 19.50 26.00 25.30 27 26.67 26.16 30.14 29.56 32 31.38 31.00 15.0 14.30 24.58 25.42 5 13.00 - - - 9.3 5.6 7.3
M20 2.5 2 1.5 20 21.60 28.00 28.20 30 29.67 29.16 33.53 32.95 34 33.38 33.00 16.0 14.90 25.58 26.42 5 14.00 - - - 9.3 7.3 5.6
(M22) 2.5 1.5 2 22 23.70 31.00 29.50 32 31.61 31.00 35.72 35.03 39 38.38 38.00 18.0 16.90 28.58 29.42 5 15.50 - - - 9.3 5.6 7.3
(M22) 2.5 1.5 2 22 23.70 33.00 31.40 34 33.38 33.00 37.72 37.29 39 38.38 38.00 18.0 16.90 28.58 29.42 5 16.50 - - - 9.3 5.6 7.3
M24 3 2 - 24 25.90 34.00 33.20 36 35.38 35.00 39.98 39.55 42 41.38 41.00 19.0 17.70 30.50 31.50 6 17.00 - - - 10.7 7.3 -

Bracketed sizes are non-preferred and should not be used.