ISO metric hexagon socket set screws Dimensions in Table

These screws are available with a variety of pointed ends. In all cases the overall length includes the chamfer at the socket end and the point.

Table 16.5

Nominal size D M3 M4 M5 M6 M8 M10 M12 M16 M20

Head diameter

A - maximum 6.72 8.96 11.2 13.44 17.92 22.4 26.88 33.6 40.32

B - minimum 5.82 7.78 9.78 11.73 15.73 19.67 23.67 29.67 35.61

Head depth H 1.86 2.48 3.1 3.72 4.96 6.2 7.44 8.8 10.16

Key engagement K 1.05 1.49 1.86 2.16 2.85 3.60 4.35 4.89 5.49

Fillet radius

Table 16.6

Nominal size D

M3

M4

M5

M6

M8

M10

M12

M16

M20

Socket size J

1.5

2

2.5

3

4

5

6

8

10

Key engagement K

1.2

1.6

2

2.4

3.2

4

4.8

6.4

8

Dog point diameter P

2

2.5

3.5

4.5

6

7

9

12

15

Dog point length Q

0.88

1.12

1.38

1.62

2.12

2.62

3.12

4.15

5.15

Cup point and 'W' point diameter C

1.4

2

2.5

3

5

6

8

10

14

Note: The cone point angle shown as Y° is generally 118° for short screws and 90° for longer lengths.

Note: The cone point angle shown as Y° is generally 118° for short screws and 90° for longer lengths.

Engineering Table Drawing
90°

Fig. 16.9 (a) Cone point (b) Dog point (c) W point (d) Cup point

Fig. 16.9 (a) Cone point (b) Dog point (c) W point (d) Cup point

Socket Dimensions Table
Fig. 16.10 Typical GKN socket screws and wrench

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