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DIN 34817:2017 Weld Screw

DIN 34817:2017 Weld Screw features a weld screw structure, making it suitable for metal connections where the screw is first welded to the base part and then used for secondary assembly.

The weld end forms a strong bond with the base material, while the external thread or head serves to mount other parts, especially where through-holes or rear nuts are inconvenient. This structure supports efficient assembly while balancing joint stability, load distribution, and convenient maintenance, making it practical for standardized purchasing and volume production.

This product can be used in automotive sheet metal, cabinets, appliance base plates, metal frames, and automated welding lines. Welding process, material, thread size, and surface condition can be selected to meet requirements for corrosion protection, wear resistance, assembly efficiency, and long-term reliability.

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Dimensions unit: inch 

Thread size d

M5

M6

M8

M10

M12

M14

P

Pitch

0.8

1

1.25

1.5

1.5

1.5

a

Max.

2.4

2.8

3.7

4.4

4.6

4.6

dk

Max.=Nominal 

10

12

16

20

24

28

Min.

9.64

11.57

15.57

19.48

23.48

27.48

dt

Max.

8.21

10.11

13.68

17.58

21.67

25.72

Min.

7.85

9.75

13.25

17.15

21.15

25.2

h

Max.=Nominal 

0.8

0.8

1.2

1.4

1.6

1.6

Min.

0.7

0.7

1.1

1.3

1.5

1.5

i

Max.

0.6

0.6

0.6

0.6

0.6

0.8

Min.

0.2

0.2

0.2

0.2

0.2

0.2

k

Nominal 

2

2.5

3

4

4.8

5.6

Max.

2.2

2.7

3.2

4.2

5

5.8

Min.

1.8

2.3

2.8

3.8

4.6

5.4

e

Nominal 

1.5

1.5

2

2

2

2.5

Max.

1.7

1.7

2.2

2.2

2.2

2.7

Min.

1.3

1.3

1.8

1.8

1.8

2.3

f

Nominal 

3.5

4

5.5

7.5

9

11

Max.

3.9

4.4

5.9

7.9

9.4

11.5

Min.

3.1

3.6

5.1

7.1

8.6

10.5

ds

Max.

5

6

8

10

12

14

Min.

4.82

5.82

7.78

9.78

11.73

13.73

Thread length b

-

-

-

-

-

-

① Material: maximum carbon content Cmax=0.25% standard DIN EN 10263-4; performance level 8.8

Note: In addition to Cmax=0.25%, the maximum carbon equivalent CEVmax=0.5% is recommended to ensure weldability 

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