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NF E 25-411 Standard Dimensions for Prevailing torque type hexagon nuts with slot(s) all-metall- Product grades A and B - Symbol H FR

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This standard sets out the characteristics of all-metal self-locking hexagonal nuts with slot (s), of grades A and B, symbol H FR, of nominal diameter M 3 to M 52 inclusive (grade A for d less than or equal to M 16 and grade B for d greater than M 16).

Dimensional Drawing and Technical Diagrams

1965_4367.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source NF E 25-411
Publication date: 12/1985
D thread size
Pitch
m max
 m max h
s nom
M 3
0.5
 3.5 4.7 1.9
5.5
M 4 0.7 4 5.6 2.2 7
M 5
0.8
 4.8 7 2.7
8
M 6 1 5.4 8.5 3 10
M 8
1.25
 6.44 10.5 3.7
13
M 10
1.5
 8.04 13 4.8
17
M 12
1.75
 10.37 15.6 6.7
19
M 14
2
 12.1 18.2 7.8
22
M 16 2 14.1 20.8 9.1 24
M 18 2.5 15.1 23.4 9.7 27
M 20 2.5 16.9 26 10.9 30
M 22
2.5
 18.1 28.6 11.7
32
M 24 3 20.2 31.2 13 36
M 27
3
 22.5 35.1 14.5
41
M 30
3.5
 24.3 37 15.7
46
M 33
3.5
 27.4 40 17.7
50
M 36
4
 29.4 43 19
55
M 39
4
 31.8 48 20.5
60
M 42
4.5
 32.4 50 20.9
65
M 45
4.5
 34.4 53 22.2
70
M 48
5
 36.4 57 23.5
75
M 52
5
 40.4 62 26.1
80

Reproduced by permission of DIN Deutsches Institut für Normung e. V. The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from Beuth Verlag GmbH, Burggrafenstraße 6, 10787 Berlin, Germany.
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