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DIN EN 1665 Standard Dimensions for Hexagon flange bolts with or without knurled underhead heavy series

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Technical History and International Equivalents of DIN EN 1665

Equivalent standards: BS EN 1665

Hexagon flange bolts with or without knurled underhead heavy series

The standard (DIN EN 1665) specifies the characteristics of hexagon head fasteners with flange, with thread sizes from M5 up to M16 enclosed, heavy series, with property classes 8.8, 10.9 and A2-70.

Dimensional Drawing and Technical Diagrams

484_CQqqiR_DIN-1665.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source DIN EN 1665
Publication date: 11/1998
d thread size
P
b (l<=125)
 b (l>125<=200) b (l>200)
c min
dk max.
 k max ds min dr
e min.
s nom=/max.
M 5
0.8
16
-
-
 1 11.8 5.8 4.82 ≈ rolling dia. 8.71 8
M 6
1
18
-
-
 1.1 14.2 6.6 5.82 ' ' 10.95 10
M 8
1.25
22
28
-
 1.2 18 8.1 7.78 ' ' 14.26 13
M 10
1.5
26
32
-
 1.5 22.3 10.4 9.78 ' ' 17.62 16
M 12
1.75
30
36
-
 1.8 26.6 11.8 11.73 ' ' 19.86 18
M 14
2
34
40
-
 2.1 30.5 13.7 13.73 ' ' 23.15 21
M 16
2
38
44
57
 2.4 35 15.4 15.73 ' ' 26.51 24
M 20 2.5 46 62 65 3 43 18.9 19.67 ' ' 33.23 30

DIN 1665 - commercial items
d thread size M5 M6
M8
M10
M12
M14
M16
M20
nominal length l
25 X
30 X X
35 X X X
40 X X X X
45 X X X X X
50 X X X X X X
55 X X X X X X
60 X X X X X X
65 X X X X X X
70 X X X X X X
80 X X X X X X
90 X X X X X
100 X X X X X
110 X X X X
120 X X X X
130 X X X
140 X X X
150 X X
160 X X
180 X
200 X

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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