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DIN 921 Standard Dimensions for Slotted pan head screws with large head

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This standard DIN 921 specifies dimensions and technical delivery conditions for M1 to M10 slotted pan head screws with large head.

Dimensional Drawing and Technical Diagrams

109_1788.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 921
Publication date:11/2014 - Supersedes DIN 921 01-2007
d thread size
 P a d1 nominal size k nominal size
n nom
 t c≈ r max
min max
M 1 0.25 0.5 3.5 0.7 0.25 0.35 0.5 0.2 0.1
M 1.2 0.25 0.5 4 0.8 0.3 0.4 0.55 0.2 0.1
M 1.4 0.3 0.6 4.5 0.9 0.3 0.45 0.6 0.25 0.1
M 1.6 0.35 0.7 5 1 0.4 0.5 0.7 0.25 0.1
M 2 0.4 0.8 6 1.2 0.5 0.6 0.8 0.30 0.1
M 2.5 0.45 0.9 7 1.5 0.6 0.75 0.95 0.40 0.1
M 3
 0.5 1.0
8
1.8
 0.8
0.9
 1.15 0.45 0.1
M 4
 0.7 1.4
12
2.4
 1
1.2
 1.5 0.60 0.2
M 5
 0.8 1.6
16
2.7
 1.2
1.3
 1.6 0.70 0.2
M 6
 1 2.0
20
3.1
 1.6
1.5
 1.9 0.80 0.25
M 8
 1.25 2.5
25
3.8
 2
1.9
 2.4 0.90 0.40
M 10 1.5 3.0 30 4.6 2.5 2.3 2.8 1.10 0.40

Dimensions in mm - source DIN 921
Publication date:01-2007 - Supersedes DIN 921 0-1986
d thread size
 P d1 nominal size k nominal size
n nom
 t
min max
M 1 0.25 3.5 0.7 0.25 0.35 0.5
M 1.2 0.25 4 0.8 0.3 0.4 0.55
M 1.4 0.3 4.5 0.9 0.3 0.45 0.6
M 1.6 0.35 5 1 0.4 0.5 0.7
M 2 0.4 6 1.2 0.5 0.6 0.8
M 2.5 0.45 7 1.5 0.6 0.75 0.95
M 3
 0.5 8 1.8 0.8 0.9 1.15
M 4
 0.7 12 2.4 1 1.2 1.5
M 5
 0.8 16 2.7 1.2 1.3 1.6
M 6
 1 20 3.1 1.6 1.5 1.9
M 8
 1.25 25 3.8 2 1.9 2.4
M 10 1.5 30 4.6 2.5 2.3 2.8

Dimensions in mm - source DIN 921
Publication date: 1986
d thread size
 P d1 nominal size k nominal size
n nom
 t
min max
M 1 0.25 3.5 0.7 0.25 0.35 0.5
M 1.2 0.25 4 0.8 0.3 0.4 0.55
M 1.4 3 4.5 0.9 0.3 0.45 0.6
M 1.6 0.35 5 1 0.4 0.5 0.7
M 2 0.4 6 1.2 0.5 0.6 0.8
M 2.5 0.45 7 1.5 0.6 0.75 0.95
M 3
 0.5 8 1.8 0.8 0.9 1.15
M 3.5 0.6 10 2 1 1 1.3
M 4
 0.7 12 2.4 1.2 1.2 1.5
M 5
 0.8 16 2.7 1.51 1.3 1.6
M 6
 1 20 3.1 1.91 1.5 1.9
M 8
 1.25 25 3.8 2.31 1.9 2.4
M 10 1.5 30 4.6 2.5 2.3 2.8

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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