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GB∕T 3098.13-1996 Mechanical properties of fasteners-Torsional test and Minimum torques for Bolts Screws

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GB∕T 3098.13-1996

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

Kinsom Fasteners Standard Share topic are coming,we will share more fasteners standard on ISO、DIN、GB、JIS、ANSI .If will help you to know more about the bolt ,screws,rivets and metal parts,know how using in process of installations.This standard more focus on the tesing methods and mininum torques.Let us share more details:

1.Fasteners-Torsional test 

2.Minimum torques

We would share more minimum torques as following :

Thread
Pitch MM

Minimum torques M b min N.m

Mechanical Properties Grade
8.89.810.912.9

M1 

0.25

0.033

0.036

0.04

0.045

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

33

36

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

According the standard,we can get:

When your M8*1.25p weld bolt,class 8.8 is 33N.m,class10.9 is 40N.m,Class 12.9 is 44N.m.


When in the processing of inspection in Kinsom,we follow the rules on PQC Process,

Using professional tools of torques ,testing before shipping out.

TOHNCHI torques wrench from Japan tools DB50N-S,DB25N-S,testing(3-25N.m,5-50N.m) 

testing on torques kinsom fasteners



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