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BS EN ISO 4034 Hexagon nuts style 1 – product grade C

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BS EN ISO 4034 Hexagon nuts style 1 – product grade C

Example for the designation of a hexagon nut with thread size d = M12 andproperty class 5:
Hexagon nut ISO 4034 – M12 – 5

All dimensions are in millimeters.

BS EN ISO 4034 Hexagon nuts style 1

BS EN ISO 4034 Hex Nuts Table 1 Preferred sizes Dimensions in mm

Thread size, d
M5
M6
M8
M10
M12
M16
M20
Pa
0.8
1
1.25
1.5
1.75
2
2.5
dw
min.
 6.7 8.7 11.5 14.5 16.5 22 27.7
e
min.
 8.63 10.89 14.20 17.59 19.85 26.17 32.95
m
max.
 5.6 6.1 7.9 9.5 12.2 15.9 19
min.
 4.4 4.6 6.4 8 10.4 14.1 16.9
m'
min.
 3.5 3.7 5.1 6.4 8.3 11.3 13.5
s
nom. = max.
 8 10 13 16 18 24 30
min.
 7.64 9.64 12.57 15.57 17.57 23.16 29.16

 

Thread size, d
M24 M30 M36 M42 M48 M56 M56
Pa
 3 3.5 4 4.5 5 5.5 6
dw
min.
 33.3 42.8 51.1 60 69.5 78.7 88.2
e
min.
 39.55 50.85 60.79 72.02 82.6 93.56 104.86
m
max.
 22.3 26.4 31.5 34.9 38.9 45.9 52.4
min.
 20.2 24.3 28 32.4 36.4 43.4 49.4
m'
min.
 16.2 19.5 22.4 25.9 29.1 34.7 39.5
s
nom. = max.
 36 46 55 65 75 85 95
min.
 35 45 53.8 63.1 73.1 82.8 92.8

 

aP = pitch of the thread.

BS EN ISO 4034 Table 2 Non-preferred sizes

Thread size, d
M14 M18 M22 M27 M33 M39 M45 M62 M60
Pa
 2 2.5 2.5 3 3.5 4 4.5 5 5.5
dw
min.
 19.2 24.9 31.4 38 46.6 55.9 64.7 74.2 83.4
e
min.
 22.78 29.56 37.29 45.2 55.37 66.44 79.95 88.25 99.21
m
max.
 13.9 16.9 20.2 24.7 29.5 34.3 36.9 42.9 48.9
min.
 12.1 15.1 18.1 22.6 27.4 31.8 34.4 40.4 46.4
m'
min.
 9.7 12.1 14.5 18.1 21.9 25.4 27.5 32.3 37.1
s
nom. = max.
 21 27 34 41 50 60 70 80 90
min.
 20.16 26.16 33 40 49 58.8 68.1 78.1 87.8

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