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Home / Products / Screws / Torx Screw / DIN EN ISO 14581:2023 Countersunk Head Torx Screw

DIN EN ISO 14581:2023 Countersunk Head Torx Screw

DIN EN ISO 14581:2023 Countersunk Head Torx Screw combines a Torx drive with a countersunk head, making it suitable for fastening points that require reliable clamping, removable maintenance, and standardized assembly. The DIN EN ISO framework supports consistent specification communication in European and international projects, supporting smooth alignment between engineering drawings, purchasing lists, and quality inspection.

From an assembly perspective, the six-lobe recess distributes torque more evenly, making it suitable for automated assembly and applications where recess wear control matters. At the same time, the tapered head seats into a prepared countersink, allowing the screw to sit flush or nearly flush with the surface, so the screw can provide stable fastening performance across different sheet thicknesses, appearance requirements, and space limitations.

It works well on flat surfaces, rails, covers, module housings, and areas where snagging or interference should be avoided. For exposed equipment positions, head forming quality, recess integrity, edge chamfering, and coating uniformity can be emphasized so fastening performance aligns with the finished product appearance.

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Dimensions unit: mm

Thread size d

M2

(M2.5)

M3

(M3.5)

M4

M5

M6

M8

M10

P

Pitch

0.4

0.45

0.5

0.6

0.7

0.8

1

1.25

1.5

a

Max.

0.8

0.9

1

1.2

1.4

2

2.5

3.13

3.75

b

Reference

25

25

25

38

38

38

38

38

38

dk

 Theoretical value 

Max.

4.4

5.5

6.3

8.2

9.4

10.4

12.6

17.3

20

Actual value

Max.

3.8

4.7

5.5

7.3

8.4

9.3

11.3

15.8

18.3

Min.

3.5

4.4

5.2

6.94

8.04

8.94

10.87

15.37

17.78

ds

≈

1.7

2.15

2.6

3.05

3.5

4.4

5.3

7.1

8.9

k

Max.=Nominal 

1.2

1.5

1.65

2.35

2.7

2.7

3.3

4.65

5

Min.

0.985

1.224

1.369

1.995

2.333

2.28

2.81

4.06

4.4

r

Max.

0.5

0.6

0.8

0.9

1

1.3

1.5

2

2.5

Min.

0.1

0.1

0.1

0.15

0.2

0.2

0.25

0.4

0.4

x

Max.

1

1.1

1.25

1.5

1.75

2

2.5

3.2

3.8

Slot number

T6

T8

T10

T15

T20

T25

T30

T45

T50

A

Reference

1.75

2.4

2.8

3.35

3.95

4.5

5.6

7.95

8.95

t

Max.

0.64

0.79

0.83

1.32

1.53

1.51

1.78

2.54

2.8

Min.

0.51

0.66

0.7

1.16

1.14

1.12

1.39

2.15

2.41

 Minimum tensile load (N) 

4.8

700

1140

1700

2280

2950

4770

6770

12300

19500

8.8

1330

2180

3220

4340

5620

9120

12900

23400

37100

10.9

1730

2820

4190

5640

7300

11800

16800

30500

48300

50

830

1360

2020

2710

3510

5680

8080

14700

23200

70

1170

1900

2820

3800

4920

7940

11300

20600

32500

Thread length b 

-

-

-

-

-

-

-

-

-

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