REV. 09/2020
7
REV. 09/2020
INFORMATION & SPECIFICATIONS
INFORMATION & SPECIFICATIONS
1
1
6
Table 1.4.1 Screws/Bolts Performance Levels
Performance Level
Material
Specification (mm)
5.8 grade
Low carbon steel
M6 ~ M48
8.8 grade
Quenched and tempered medium
carbon steel
M6 ~ M48
10.9 grade Quenched and tempered medium
carbon alloy steel
M6 ~ M48
12.9 grade Quenched and tempered medium
carbon alloy steel
M6 ~ M48
Table 1.4.2 Metric Screws/Bolts Tightening Torque Table (n•m)
Nominal Diameter
(mm)
Performance Level
5.8
8.8
10.9
12.9
Proof Stress (MPa)
380
600
830
970
M6
7~8
10~12
14~17
17~20
M8
16~18
25~30
34~41
41~48
M8×1
17~20
27~32
37~43
43~52
M10
31~36
49~59
68~81
81~96
M10×1
35~41
55~66
76~90
90~106
M12
55~64
86~103
119~141
141~167
M12×1.5
57~67
90~108
124~147
147~174
M14
87~103
137~164
189~224
224~265
M14×1.5
144~170
149~179
206~243
243~289
M16
136~160
214~256
295~350
350~414
M16×1.5
144~170
228~273
314~372
372~441
M18
186~219
294~353
406~481
481~570
M18×1.5
210~247
331~397
457~541
541~641
M20
264~312
417~500
576~683
683~808
M20×1.5
294~345
463~555
640~758
758~897
M22
360~431
568~680
786~941
918~1099
M22×1.5
395~473
624~747
803~1034
1009~1208
M24
457~547
722~864
998~1195
1167~1397
M24×2
497~595
785~940
1086~1300
1269~1520
M27
669~801
1056~1264
1461~1749
1707~2044
M27×2
723~865
1141~1366
1578~1890
1845~2208
M30
908~1087
1437~1717
1984~2375
2318~2775
M30×2
1005~1203
1587~1900
2196~2629
2566~3072
M36
1587~1900
2506~3000
3466~4150
4051~4850
M36×3
1680~2011
2653~3176
3670~4394
4289~5135
M42
2538~3039
4088~4798
5544~6637
6479~7757
M42×3
2731~3269
4312~5162
5965~7141
6921~8345
M48
3813~4564
6020~7207
8327~9969
9732~11651
M48×3
4152~4970
6556~7848
9069~10857
10598~12688
12.9
10.9
8.8
5.8
1.4 General Tightening Torques
Screws or bolts used on the truck are of 8.8
grade or higher performance level.
When you are conducting truck maintenance,
you can refer to Table 1.4.1 and Table 1.4.2 to
select the suitable screws or bolts for replace-
ment.
-
-
CAUTION
The performance levels of screws or bolts are
marked on the heads of the screws or bolts.
If you find the screws or bolts used on certain
position are not marked with performance
level, please select spare parts with perform-
ance level of at least 8.8 grade or higher level
for replacement.