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 TM 10-3930-660-24-2
TORQUE LIMITS
SCOPE
This work package lists standard torque values and provides general information for applying torque. Special torque val-
ues and tightening sequences are indicated in the maintenance procedures for applicable components.
GENERAL
1.
Always use torque values listed in Tables 1 and 2 when a maintenance procedure does not give a specific torque value.
a.
Table 1 provides torque limits for SAE standard fasteners.
b.
Table 2 provides torque limits for metric fasteners.
Unless otherwise indicated, standard torque tolerance shall be 10%.
2.
3.
Torque values listed are based on clean, dry threads. Reduce torque by 10% when engine oil is used as a lubricant.
Reduce torque by 20% if new plated capscrews are used.
4.
If the maintenance procedures do not specify a tightening order, use the following guides:
a.
Unless otherwise specified, lubricate threads of fasteners with oil (OEA-10).
b.
When tightening fasteners above 30 lb-ft (41 Nm), use the torque pattern but only tighten to 70% of final value
(multiply final value by 0.7). Repeat pattern until final value is reached.
c.
Tighten circular patterns using circular torque pattern and tighten straight patterns using straight torque pattern.
1
8
5
12
10
4
3
11
9
6
7
2
CIRCULAR TORQUE PATTERN
8
531246
9
7
STRAIGHT TORQUE PATTERN
CAUTION
If replacement capscrews are of higher grade than originally supplied, use torque specifications for the orig-
inal. This will prevent equipment damage due to overtorquing.
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