Technical History and International Equivalents of DIN EN ISO 21670

Hexagon weld nuts with flange

This International Standard (DIN 21670 and equivalents) specifies the characteristics of hexagon weld nuts with flange, with metric coarse pitch thread from M5 to M16 and metric fine pitch thread with norminal thread diameter from 12 mm to 16 mm, product grade A.

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 21670

Publication date: 09/2014 Replaces DIN 21670: 01/2004

d thread size
P
h max.
h min
s nom
e min
dc 0/-1
f max f min g ±0.1 ≈ weigth in kg x1000 pcs, (ρ=7,85 kg/dm3)
M 5
0.8
5
4.7
8
8.2 15.5 1.95 1.45 4 2.9
M 6
1
7 6.64
10
10.6 18.5 2.25 1.75 5 5.7
M 8
1.25
10 9.64
13
13.6 22.5 2.75 2.25 6 12.2
M 10
1.5
12 12.57
15
16.9 26.5 3.25 2.75 7 21.8
M 12
1.75
15
14.57
18
19.4 30.5 3.25 2.75 8 29.4
M 14
2
17
16.16
21
22.4 33.5 4.25 3.75 8 45.8
M 16
2
19.5
18.66
24
25 36.5 4.25 3.75 8 63.1