Standard Torque Specifications - PREVOST X3-45 COMMUTER Maintenance Manual

5.1 STANDARD TORQUE SPECIFICATIONS

The following table lists the standard tightening torques for bolts and nuts, relating tightening torque to
thread diameter. Use the following table as a general guide for tightening torques. Use this table only for
the bolts and nuts which do not require a specific torque value. All of the values are for use with dry
solvent-cleaned threads.
TYPE DESCRIPTION
SAE 1/4-20
SAE 1/4-20
SAE 1/4-28
SAE 1/4-28
SAE 5/16-18
SAE 5/16-18
SAE 5/16-24
SAE 5/16-24
SAE 5/16-24
SAE 3/8-16
SAE 3/8-16
SAE 3/8-24
SAE 3/8-24
SAE 7/16-14
SAE 7/16-14
SAE 7/16-20
SAE 7/16-20
SAE 1/2-13
SAE 1/2-13
SAE 1/2-20
SAE 1/2-20
SAE 9/16-12
SAE 9/16-12
SAE 9/16-18
SAE 9/16-18
SAE 5/8-11
SAE 5/8-11
SAE 5/8-18
DOB 2490-2789
THREAD
unc
unc
unf
unf
unc
unc
unf
unf
unf
unc
unc
unf
unf
unc
unc
unf
unf
unc
unc
unf
unf
unc
unc
unf
unf
unc
unc
unf
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X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
SECTION 00: GENERAL INFORMATION
GRADE
5
8
5
8
5
8
2
5
8
5
8
5
8
5
8
5
8
5
8
5
8
5
8
5
8
5
8
5
RECOMMENDED
TORQUE
lbf-ft (dry) otherwise
specified
Tolerance: ±10%
100 lbf-in (dry)
143 lbf-in (dry)
115 lbf-in (dry)
163 lbf-in (dry)
210 lbf-in (dry)
305 lbf-in (dry)
120 lbf-in (dry)
230 lbf-in (dry)
325 lbf-in (dry)
31
44
35
50
50
70
55
78
75
107
85
120
109
154
122
172
151
211
170
9