Shibaura ST318, Workshop Manual

Page: 9 / 247

8
METRIC BOLT TORQUE SPECIFICATIONS
Bolt Size Grade No.
Coarse Thread Fine Thread
Pitch (mm) Newton Meters
Kiro-gram
Meters
Pitch (mm)
Newton-
Meters
Kiro-gram
Meters
M6
4T, 4.8
1.0
4.9-6.9 0.5-0.6
- - - - - - - - - - - - - - - 7T, 8T, 8.8 8.3-11.3 0.85-1.15
10T, 11T 11.7-15.7 1.2-1.6
M8
4T, 4.8
1.25
12.7-16.7 1.3-1.7
1.0
15.2-20.1 1.55-2.05
7T, 8T, 8.8 22.6-28.4 2.3-2.9 26.5-34.3 2.7-3.5
10T, 11T 28.5-36.3 2.9-3.7 30.4-40.2 3.1-4.1
M10
4T, 4.8
1.5
25.5-33.3 2.6-3.4
1.25
28.4-36.2 2.9-3.7
7T, 8T, 8.8 44.1-55.9 4.5-5.7 49.0-62.7 5.0-6.4
10T, 11T 54.0-69.6 5.5-7.1 57.8-73.5 5.9-7.5
M12
4T, 4.8
1.75
37.3-47.0 3.8-4.8
1.25
43.1-54.9 4.4-5.6
7T, 8T, 8.8 65.7-83.3 6.7-8.5 74.5-94.1 7.6-9.6
10T, 11T 92.0-116 9.4-11.8 99.0-126 10.1-12.9
M14
4T, 4.8
2.0
62.8-80.4 6.4-8.2
1.5
69.6-87.2 7.1-8.9
7T, 8T, 8.8 104-132 10.6-13.4 117-148 11.9-15.1
10T, 11T 139-175 14.2-17.8 149-184 15.2-18.8
M16
4T, 4.8
2.0
86.1-110 8.8-11.2
1.5
91.1-114 9.3-11.7
7T, 8T, 8.8 149-185 15.2-18.8 157-192 16.0-19.6
10T, 11T 205-255 21-26 221-269 22.5-27.5
M18
4T, 4.8
2.0
113-141 11.6-14.4
1.5
132-162 13.4-16.6
7T, 8T, 8.8 196-236 20-24 231-279 23.5-28.5
10T, 11T 275-333 28-34 298-367 30.5-37.5
M20
4T, 4.8
2.5
144-180 14.7-18.3
1.5
172-210 17.5-21.5
7T, 8T, 8.8 240-290 24.5-29.5 275-333 28.0-34.0
10T, 11T 363-441 37-45 397-485 40.5-49.5
Bolt head identification mark Strength grade
Example
4.8
4.8
8.8
T003
10.9
Indicates yield point,
80% of tensile strength
32 kgf/mm
2
Tensile strength
40 kgf/mm
2