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UNI 6591 Standard Dimensions for Tapping screws, slotted pan head

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Tapping screws, slotted pan head 

Dimensional Drawing and Technical Diagrams

263_1897.jpg

Key Dimensions and Technical Parameters

Dimensions in mm - source UNI 6951Withdrawn

Publication date: 11-1978
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

UNI 6951 - ≈ 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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