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PARTS MANUAL
Copyright
©
2007 Terramite Corporation
General Tightening Torque for Bolts, Nuts and Taperlock Studs - V20
The following charts give the standard torque values for bolts, nuts and taperlock studs for SAE Grade 5
or better quality.
Use these torques for bolts and nuts with
standard threads (conversions are ap-
proximate).
Thread
Size
Standard Torque
Inches
Lb. Ft.
N.m*
1/4
9 ± 3
12 ± 4
5/16
18 ± 5
25 ± 7
3/8
32 ± 5
45 ± 7
7/16
50 ± 10
70 ± 15
1/2
75 ± 10
100 ± 15
9/16
110 ± 15
150 ± 20
5/8
150 ± 20
200 ± 25
3/4
265 ± 35
360 ± 50
7/8
420 ± 60
570 ± 80
1
- /
640 ± 80
875 ± 100
1-1/8
800 ± 100
1100 ± 150
1-1/4
1000 ± 120
1350 ± 175
1-3/8
1200 ± 150
1600 ± 200
1-1/2
1500 ± 200
2000 ± 275
*1 newton meter (N.m) is approximately the same as 0.1 mkg.
standard thread
Metric Fasteners
[Usually, material strength identification on
bolt head is with number (i.e., 8.8, 10.9, etc.)]
The chart on the right gives the torque for
bolts and nuts with Grade 8.8.
NOTICE: Caution must be taken to avoid
mixing metric and standard (customary)
fasteners. Mismatched or incorrect fasteners
can result in vehicle damage or malfunction,
or possible personal injury. Original fasteners
removed from the vehicle should be saved
for assembly when possible. If new ones are
required, caution must be taken to replace
with one that is of same part no. and grade or
better.
Metric ISO Thread
Thread
Size
Torque
(mm)
(N-m*)
(Lb. Ft.)
M6
12 ± 4
9 ± 3
M8
25 ± 7
18 ± 5
M10
55 ± 10
40 ± 7
M12
95 ± 15
70 ± 10
M14
150 ± 20
110 ± 15
M16
220 ± 30
160 ± 20
M18
325 ± 50
240 ± 35
M20
450 ± 70
330 ± 50
M22
600 ± 90
440 ± 65
M24
775 ± 100
570 ± 75
M27
1150 ± 150
840 ± 110
M30
1610 ± 200
1175 ± 150
M33
2000 ± 275
1450 ± 200
M36
2700 ± 400
2000 ± 300
ISO - International Standard Organization
*1 newton meter (N.m) is approximately the same as 0.1 mkg.
4.34
