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TECHNICAL DATA

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1. GB/T3098.13-1996 idt ISO 898-7:1992

Mechanical properties of fasteners-Torsional test and Minimum torques for Bolts Screws with nominal diameters 1MM to 10MM from Grade8.8-12.9

Thread
Pitch MM

Minimum torques M b min N.m

Mechanical Properties Grade
8.8 9.8 10.9 12.9

M1.2

0.25

0.075

0.082

0.092

0.1

M1.2

0.25

0.075

0.082

0.092

0.1

M1.4

0.3

0.12

0.13

0.14

0.16

M1.6

0.35

0.16

0.18

0.2

0.22

M2

0.4

0.37

0.4

0.45

0.50

M2.5

0.45

0.80

0.9

1.0

1.1

M3

0.5

1.5

1.7

1.9

2.1

M3.5

0.6

2.4

2.7

3.0

3.3

M4

0.7

3.6

3.9

4.4

4.9

M5

0.8

7.6

8.3

9.3

10

M6

1

13

14

16

17

M7

1

23

25

28

31

M8

1.25

30

33

40

44

M8 *1

-

38

42

46

52

M10

1.5

66

72

81

90

M10*1

-

84

92

102

114

M10*1.25

-

75

82

91

102

1. GB/T3098.13-1996 idt ISO 898-7:1992

Material

Grade

Tensile Strength R /MPa Min

A1 A2 A3 A4 A5 50 500
70 700
80 800
 

Diameterd

Break Torques Mb Min/N.M
Grade
50 70 80

M1.6

0.15

0.2

0.24

M2

0.3

0.4

0.48

M2.5

0.6

0.9

0.96

M3

1.1

1.6

1.8

M4

2.7

3.8

4.3

M5

5.5

7.8

8.8

M6

9.3

13

15

M8

23

32

37

M10

46

65

74

M12

80

110

130

M16

210

290

330

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