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DIN 7500-2 Standard Dimensions for Thread rolling screws for ISO metric thread

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The part 2 of this norm gives guide values for hole diameters for thread rolling screws DIN 7500-1 and DIN 267-30. The hole diameters are only guide values because they are assigned to different Materials and lenghts of engagement. Bigger hole diameters can be required, for example for special procedures. This norm doesn''t apply to holes with special forms, for example triangular and octagonal holes.

Dimensional Drawing and Technical Diagrams

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Key Dimensions and Technical Parameters

DIN 7500 - 2 Guideline values for hole diameters
Publication date 12/1984
d thread size
M 2.5
M 3
M 3.5
M 4
M 5

M 6
M 8
M 10
Material thickness or length of engagement

Hole diameter dh (tolerance class H11)
St│Al│Cu St│Al│Cu
St│Al│Cu
 St│Al│Cu
St│Al│Cu

St│Al│Cu
St│Al│Cu
 St│Al│Cu
0.8 2.25
0.9 2.25
1 2.25 2.7
1.2 2.25 2.7 3.15
1.5 2.25 2.7 3.15 3.6 4.5
1.6 2.25 2.7 3.2 3.6 4.5
1.7 2.25 2.7 3.2 3.6 4.5
1.8 2.25 2.75│2.7│2.7 3.2 3.6 4.5
2 2.25 2.75│2.7│2.7 3.2 3.6 4.5 5.4
2.2 2.25 2.75 3.2 3.6 4.5 5.4 7.25
2.5 2.25 2.75 3.2 3.65│3.6│3.6 4.5 5.4 7.25 9.2│
3 2.3 2.75 3.2 3.65│3.6│3.6 4.5 5.45 7.25 9.2│9.15│9.15
3.2 2.3 2.75 3.2 3.65│3.6│3.6 4.55│4.5│4.5 5.45 7.25 9.2│9.15│9.15
3.5 2.3 2.75 3.2 3.65 4.55 5.45 7.25 9.2│9.15│9.15
4 2.3 2.75 3.2 3.65 4.55 5.55│5.45│5.45 7.3 9.3│9.15│9.15
5 2.3 2.75 3.2│3.25│3.25 3.7│3.65│3.65 4.6 5.55│5.45│5.45 7.4│7.3│7.3 9.3│9.2│9.25
5.5 2.75 3.2│3.25│3.25 3.7│3.65│3.65 4.6 5.5 7.4│7.3│7.3 9.3│9.2│9.25
6 2.75 3.7│3.65│3.65 4.6 5.5 7.4│7.3│7.3 9.3│9.2│9.25
6.3 3.7 4.65 5.5 7.4│7.3│7.35 9.3│9.2│9.25
6.5 3.7 4.65 5.5 7.4│7.3│7.35 9.3│9.2│9.25
7 3.7 4.65 5.55│5.5│5.5 7.4│7.3│7.4 9.3│9.2│9.3
7.5 3.7 4.65 5.55│5.5│5.5 7.4│7.3│7.4 9.4│9.3│9.3
8 to ≤ 10 4.65 5.55 7.4│7.3│7.4 9.4│9.3│9.3
> 10 to ≤ 12 7.5 9.5│9.4│9.4
>12 to ≤ 15 7.5 9.5│9.4│9.4
> 15 to ≤ 20 │9.5

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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