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Section 1
2 - 1
Use only where no torque setting is specified in the text. Values are for dry threads and may be within three per cent of the
figures stated. For lubricated threads the values should be REDUCED by one third.
UNF Grade 'S' Bolts
Bolt Size
in
/
1
4
*
/
5
16
3
/
8
7
/
16
1
/
2
9
/
16
5
/
8
/
3
4
7
/
8
1
1
1
/
4
1
1
/
2
Metric Grade 8.8 Bolts
Bolt Size
in
M5
M6
M8
M10
M12
M16
M20
M24
M30
M36
Note: All bolts used on JCB machines are high tensile and must not be replaced by bolts of a lesser tensile specification.
9803/8500
General Information
Hexagon (A/F)
(mm)
in
(6.3)
/
7
16
(7.9)
/
1
2
(9.5)
9
/
16
(11.1)
5
/
8
(12.7)
3
/
4
(14.3)
13
/
16
(15.9)
15
/
16
(19.0)
1
/
1
8
(22.2)
1
5
/
16
(25.4)
1
1
/
2
(31.7)
1
7
/
8
(38.1)
2
1
/
4
Hexagon (A/F)
(mm)
in
(5)
8
(6)
10
(8)
13
(10)
17
(12)
19
(16)
24
(20)
30
(24)
36
(30)
46
(36)
55
Torque Settings
Nm
14
28
49
78
117
170
238
407
650
970
1940
3390
Nm
7
12
28
56
98
244
476
822
1633
2854
Torque Settings
kgf m
lbf ft
1.4
2.8
5.0
8.0
12.0
17.3
24.3
41.5
66.3
99.0
198.0
1430
345.0
2500
Torque Settings
kgf m
lbf ft
0.7
1.2
3.0
5.7
10
25
180
48
352
84
607
166
1205
291
2105
Section 1
2 - 1
10
20
36
58
87
125
175
300
480
715
5
9
21
42
72
Issue 2*
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