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DIN EN ISO 14579:2011 Socket Head Cap Torx Screw

DIN EN ISO 14579:2011 Socket Head Cap Torx Screw combines a cylindrical head with an internal Torx drive, providing stable tool engagement and efficient torque transmission in compact fastening areas.

Compared with conventional drive forms, the Torx recess helps reduce cam-out and minimizes damage to the drive during repeated or high-volume assembly. The clean cylindrical head profile also supports neat installation where the fastener head needs to sit close to the equipment surface.

This screw is suitable for instruments, automation equipment, precision machinery, molds, fixtures, and electrical assemblies. It can be supplied in different strength classes, materials, and surface finishes to meet requirements for corrosion resistance, wear resistance, and consistent appearance.

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Dimensions unit: mm

Thread size  d

M2

M2.5

M3

M4

M5

M6

M8

M10

M12

(M14)

M16

(M18)

M20

P

Pitch

0.4

0.45

0.5

0.7

0.8

1

1.25

1.5

1.75

2

2

2.5

2.5

dk

Max.

Crew cut

3.8

4.5

5.5

7

8.5

10

13

16

18

21

24

27

30

Knurled head

3.98

4.68

5.68

7.22

8.72

10.22

13.27

16.27

18.27

21.33

24.33

27.33

30.33

Min.

3.62

4.32

5.32

6.78

8.28

9.78

12.73

15.73

17.73

20.67

23.67

26.67

29.67

da

Max.

2.6

3.1

3.6

4.7

5.7

6.8

9.2

11.2

13.7

15.7

17.7

20.2

22.4

ds

Max.

2

2.5

3

4

5

6

8

10

12

14

16

18

20

Min.

1.86

2.36

2.86

3.82

4.82

5.82

7.78

9.78

11.73

13.73

15.73

17.73

19.67

L1

Max.

0.51

0.51

0.51

0.6

0.6

0.68

1.02

1.02

1.45

1.45

1.45

1.87

2.04

k

Max.

2

2.5

3

4

5

6

8

10

12

14

16

18

20

Min.

1.86

2.36

2.86

3.82

4.82

5.7

7.64

9.64

11.57

13.57

15.57

17.57

19.48

r

Min.

0.1

0.1

0.1

0.2

0.2

0.25

0.4

0.4

0.6

0.6

0.6

0.6

0.8

V

Max.

0.2

0.25

0.3

0.4

0.5

0.6

0.8

1

1.2

1.4

1.6

1.8

2

dw

Min.

3.48

4.18

5.07

6.53

8.03

9.38

12.33

15.33

17.23

20.17

23.17

25.87

28.87

w

Min.

0.55

0.85

1.15

1.4

1.9

2.3

3.3

4

4.8

5.8

6.8

7.8

8.6

Slot number

6

8

10

20

25

30

45

50

55

60

70

80

90

A

Reference value

1.75

2.4

2.8

3.95

4.5

5.6

7.95

8.95

11.35

13.45

15.7

17.75

20.2

t

Max.

0.84

1.04

1.27

1.8

2.03

2.42

3.31

4.02

5.21

5.99

7.01

8

9.2

Min.

0.71

0.91

1.01

1.42

1.65

2.02

2.92

3.62

4.82

5.62

6.62

7.5

8.69

Thousand pieces of steel weigh ≈kg

-

-

-

-

-

-

-

-

-

-

-

-

-

Thread length b

-

-

-

-

-

-

-

-

-

-

-

-

-

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