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Home / Products / Screws / Phillips Screw / DIN 7985:1986 Socket Head Cap Phillips Spherical Seat Screw

DIN 7985:1986 Socket Head Cap Phillips Spherical Seat Screw

DIN 7985:1986 Socket Head Cap Phillips Spherical Seat Screw combines a Phillips drive with a socket head cap profile, making it suitable for fastening points that require reliable clamping, removable maintenance, and standardized assembly. The DIN standard background helps keep dimensional requirements clear across drawings, purchasing, and quality inspection, supporting smooth alignment between engineering drawings, purchasing lists, and quality inspection.

From an assembly perspective, the cross recess provides good centering and suits production assembly, workstation operations, and joints requiring controlled driving. At the same time, the cylindrical head provides useful bearing height and tool engagement depth, supporting high-strength fastening in compact layouts, so the screw can provide stable fastening performance across different sheet thicknesses, appearance requirements, and space limitations.

It is suitable for machinery, molds, automation systems, and joints requiring reliable tightening. It can be supplied in carbon steel, alloy steel, stainless steel, and other materials, with zinc plating, nickel plating, black oxide, phosphating, or other finishes to balance corrosion resistance, appearance, and assembly friction.

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Dimensions unit: mm

Thread size  d

M1.6

M2

M2.5

M3

(M3.5)

M4

M5

M6

M8

M10

P

Pitch

0.35

0.4

0.45

0.5

0.6

0.7

0.8

1

1.25

1.5

a

Max.

0.7

0.8

0.9

1

1.2

1.4

1.6

2

2.5

3

b

Tolerance（+2P，0）

15

16

18

19

20

22

25

28

34

40

da

Max.

2.1

2.6

3.1

3.6

4.1

4.7

5.7

6.8

9.2

11.2

dk

Max.=Nominal

3.2

4

5

6

7

8

10

12

16

20

Min.

2.9

3.7

4.7

5.7

6.64

7.64

9.64

11.57

15.57

19.48

k

Nominal

1.3

1.6

2

2.4

2.7

3.1

3.8

4.6

6

7.5

Max.

1.42

1.72

2.12

2.52

2.82

3.25

3.95

4.75

6.15

7.68

Min.

1.18

1.48

1.88

2.28

2.58

2.95

3.65

4.45

5.85

7.32

r

Max.

0.1

0.1

0.1

0.1

0.2

0.2

0.2

0.25

0.4

0.4

R

≈

3

4

5

6

7

8

10

12

16

20

V

≈

0.8

1.1

1.3

1.6

1.9

2

2.5

3

3.7

4.8

x

Max.

0.9

1

1.1

1.25

1.5

1.75

2

2.5

3.2

3.8

Slot number

0

1

1

1

2

2

2

3

4

4

M1

≈

1.8

2.5

2.7

3.1

4.2

4.6

5.3

6.8

9

10.2

M2

≈

1.8

2.4

2.6

3

4

4.3

5

6.7

8.8

9.9

Depth

Cross recess H type

Min.

0.72

1.1

1.3

1.7

1.74

2.04

2.77

3.03

4.18

5.38

Max.

1.02

1.4

1.6

2

2.24

2.54

3.27

3.53

4.68

5.88

Cross recess Z type

Min.

0.92

1.1

1.27

1.68

1.65

1.9

2.64

3.02

4.06

5.23

Max.

1.17

1.35

1.52

1.93

2.11

2.36

3.1

3.48

4.52

5.69

Thousand pieces of steel weigh ≈kg

-

-

-

-

-

-

-

-

-

-

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