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DIN 7971 Standard Dimensions for Tapping screws, slotted pan head

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Technical History and International Equivalents of DIN 7971

This norm has been cancelled
This norm has been replaced by DIN EN ISO 1481

Tapping screws, slotted pan head

Dimensional Drawing and Technical Diagrams

1756_3743.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source DIN 7971Withdrawn

Publication date: 08 - 1990
Ø
 P
dk max
 dk min
k max
 k min
t max
 t min
n max
 n min Y form C Y form F
ST 2.2
  1. 0.8
4.2
 3.9
1.35
 1.15
0.8
 0.55
0.8
 0.66 2 1.6
ST 2.9
 1.1
5.6
 5.3
1.75
 1.5
1
 0.75
1
 0.86 2.6 2.1
ST 3.5
 1.3
6.9
 6.54
2.1
 1.85
1.25
 0.95
1.2
 1.06 3.2 2.5
ST 3.9
 1.3
7.5
 7.14
2.25
 2
1.4
 1.05
1.2
 1.06 3.5 2.7
ST 4.2
 1.4
8.2
 7.84
2.45
 2.15
1.5
 1.15 1.51 1.26 3.7 2.8
ST 4.8
 1.6
9.5
 9.14
2.8
 2.5
1.7
 1.35 1.51 1.26 4.3 3.2
ST 5.5
 1.8
10.8
 10.37
3.2
 2.85
1.95
 1.55 1.91 1.66 5 3.6
ST 6.3
 1.8
12.5
 12.07
3.65
 3.3
2.2
 1.8 1.91 1.66 6 3.6

DIN 7971 - ≈ weigth, in kg x1000 pcs, (ρ=7,85 kg/dm3) - commercial lengths
thread size ST 2 ST 2.9 ST 3.5 ST 3.9 ST 4.2 ST 4.8 ST 5.5 ST 6.3
nominal length l
4.5 0.174
6.5 0.214 0.424
9.5 0.274 0.532 0.84 1.07 1.26 1.85
13 0.404 0.658 1.02 1.29 1.5 2.18 3.24 4.32
16 0.766 1.17 1.48 1.71 2.48 3.62 4.86
19 0.874 1.32 1.67 1.92 2.74 4 5.4
22 1.47 1.86 2.13 3.02 4.38 5.94
25 1.62 2.05 2.34 3.3 4.76 6.48
32 2.83 3.96 5.67 7.74
38 4.52 6.45 8.82

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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