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Home / Products / Screws / Hexagon Socket Screws / DIN EN ISO 7380-1:2023 Round Head Hex Socket Screw

DIN EN ISO 7380-1:2023 Round Head Hex Socket Screw

DIN EN ISO 7380-1:2023 Round Head Hex Socket Screw combines a hex socket drive with a round 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 internal hex socket provides deeper tool engagement, enabling higher assembly torque in compact spaces while reducing external head interference. At the same time, the rounded head provides a smooth visible profile, reducing sharp edges while offering a practical bearing area, so the screw can provide stable fastening performance across different sheet thicknesses, appearance requirements, and space limitations.

It fits visible parts, light equipment, panel fastening, and installation points where sharp protrusions should be avoided. Supply configuration can be refined by size range, strength grade, thread specification, recess control, and surface finish, making it suitable for use with washers, nuts, or pre-tapped holes.

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Dimensions unit: mm

Nominal diameter d

M3

M4

M5

M6

M8

M10

M12

M16

P

Pitch

0.5

0.7

0.8

1

1.25

1.5

1.75

2

b

Reference

18

20

22

24

28

32

36

44

da

Max.

3.6

4.7

5.7

6.8

9.2

11.2

13.7

17.7

dk

Max.

5.7

7.6

9.5

10.5

14

17.5

21

28

Min.

5.4

7.24

9.14

10.07

13.57

17.07

20.48

27.48

d1

Reference

2.6

3.8

5

6

7.7

10

12

16

ds

Max.

3

4

5

6

8

10

12

16

Min.

2.86

3.82

4.82

5.82

7.78

9.78

11.73

15.73

dw

Min.

4.97

6.66

8.41

9.26

12.48

15.7

18.84

25.28

e ③

Min.

2.3

2.87

3.44

4.58

5.72

6.86

9.15

11.43

k

Max.

1.65

2.2

2.75

3.3

4.4

5.5

6.6

8.8

Min.

1.4

1.95

2.5

3

4.1

5.2

6.24

8.44

r3

Max.

3.7

4.6

5.75

6.15

7.95

9.8

11.2

15.3

Min.

3.3

4.2

5.25

5.65

7.45

9.2

10.5

14.5

r1

Min.

0.1

0.2

0.2

0.25

0.4

0.4

0.6

0.6

r2

Min.

0.3

0.4

0.45

0.5

0.7

0.7

1.1

1.1

s

Nominal 

2

2.5

3

4

5

6

8

10

Max.

2.08

2.58

3.08

4.095

5.14

6.14

8.175

10.175

Min.

2.02

2.52

3.02

4.02

5.02

6.02

8.025

10.025

t

Max.

1.2

1.65

2.12

2.26

3.05

3.75

4.61

6.19

Min.

1.04

1.3

1.56

2.08

2.6

3.12

4.16

5.2

w

Min.

0.2

0.3

0.38

0.74

1.05

1.45

1.63

2.25

Minimum tensile load (N) 

8.8 ①

3220

5620

9120

12900

23400

37100

54000

101000

10.9 ①

4190

7300

11800

16800

30500

48300

70200

130000

Level 12.9/12.9/12.9 ①

4910

8640

13900

19700

35800

56600

82400

154000

70 ②

2820

4920

7940

11300

20600

32500

47200

88000

80 ②

3220

5620

9120

12900

23400

37100

54000

101000

Thread length b

-

-

-

-

-

-

-

-

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