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Technical Information for Sockets

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ISO METRIC SOCKET HEAD CAP SCREWS

sockets1.jpg (20362 bytes)
Applicable Specification:
BS4168
Din 912
ISO 4762
BS6104 Grade 12.9
ISO 898/1 Grade 12.9

Dimensions and Tightening Torques - ISO Metric Threads

Nom.
Thread
Size

 

Pitch

A

Max.

B

Max.

da

Max.

H

Max.

W

Nom.

L

Nom.

Length
Of
Thread
T

Typical Tightening Torques


Induced Load

Unplated

Cadmium Plated

Nm

Ibf. In

Nm

Ibf.in.

N

Ibf.

M3
M4
M5

0.5
0.7
0.8

5.50
7.00
8.50

3.00
4.00
5.00

3.60
4.70
5.70

3.00
4.00
5.00

2.5
3.0
4.0

20
25
25

18
20
22

2.45
5.59
11.28

22
49
100

1.96
4.22
8.53

17
37
76

4,021
6,963
11,474

902
1,562
2,574

M6
M8
M10

1.0
1.25
1.50

10.00
13.00
16.00

6.0
8.0
10.0

6.80
9.20
11.20

6.00
8.00
10.0

5.0
6.0
8.0

30
35
40

24
28
32

19.12
46.09
92.18

169
408
816

14.71
36.28
91.59

130
321
633

16,132
29,616
47,268

3,619
6,644
10,604

M12
(M14)
M16

1.75
2.00
2.00

18.00
21.00
24.00

12.00
14.00
16.00

14.20
16.20
18.20

12.00
14.00
16.00

10.0
12.0
14.0

45
55
55

36
40
44

158.87
254.97
387.36

1,406
2,256
3,428

122.58
196.13
304.00

1,085
1,736
2,691

68,745
94,536
129,938

15,422
21,200
29,150

(M18)
M20
(M22)

2.50
2.50
2.50

27.00
30.00
33.00

18.00
20.00
22.00

20.20
22.40
24.40

18.00
20.00
22.00

14.0
17.0
17.0

60
65
70

48
52
56

534.46
750.21
1059.12

4,730
6,640
9,574

421.68
598.20
794.34

3,732
5,294
7,031

157,887
202,948
253,992

35,400
45,540
57,000

M24
M27
M30

3.00
3.00
3.50

36.00
40.00
45.00

24.00
27.00
30.00

26.40
30.40
33.40

24.00
27.00
30.00

19.0
19.0
22.0

80
90
90

60
66
72

1294.47
1912.29
2588.95

11,458
16,926
22,915

1019.89
1529.84
2079.00

9,027
13,541
18,402

282,431
385,401
468,758

63,360
86,460
105,160

M33
M36
M42

3.50
4.00
4.50

50.00
54.00
63.00

33.00
36.00
42.00

36.40
39.40
45.60

33.00
36.00
42.00

24.0
27.0
32.00

100
110
120

78
84
96

3540.20
4520.86
7217.69

31,335
40,015
63,885

2824.31
3618.65
5766.31

24,998
32,029
51,038

584,476
685,485
942,419

131,120
153,780
211,420

All dimensions in millimetres
Sizes in brackets are non-preferred.
Notes:
1. Thread Class -
5g, 6g.
2. da - Transition diameter
3. Working Temperature - -50oC, +300oC

Material - High Grade Alloy Steel
Tensile Strength - 1240 MPa (1,274 n/mm2) Minimum
Shear - 744 MPa (765 N/mm2)
0.2% Proof Stress - 1115 MPa (1,147 N/mm2)
Elongation % on GL5.65
(square root) A=9% here A=cross-sectional area
OTHER SIZES AND THREAD FORMS AVAILABLE