TM 5-2330-325-13&P
FIELD MAINTENANCE
TORQUE LIMITS
SCOPE
This work package lists standard torque values and provides general information for applying torque. Special
torque values and tightening sequences are indicated in the maintenance procedures for applicable components.
GENERAL
1.
Always use torque values listed in Tables 2 and 3 when a maintenance procedure does not give a specific
torque value.
a.
Table 2 provides torque limits for Society of Automotive Engineers (SAE) standard fasteners.
b.
Table 3 provides torque limits for metric fasteners.
2.
Unless otherwise indicated, standard torque tolerance shall be 10 percent.
CAUTION
If replacement capscrews are of higher grade than originally supplied, use torque
specifications for the original. This will prevent equipment damage due to overtorquing.
Failure to comply may result in damage to, or destruction of, equipment or mission.
3.
Torque values listed in Table 2 are based on clean, dry threads. Reduce torque by 10 percent when engine
oil is used as a lubricant. Reduce torque by 20 percent if new plated capscrews are used.
TIGHTENING METAL FASTENERS
When torquing a fastener, select a wrench whose range fits the required torque value. A torque wrench is
most accurate from 25-75 percent of its stated range. A wrench with a stated range of 0-100 lb ft
(0-136 Nm) will be most accurate from 25-75 lb ft (34-102 Nm). The accuracy of readings will decrease as
you approach 0 lb ft or 100 lb ft (136 Nm). Ranges in Table 1 are based on this principle.
Table 1.
Metal Fasteners.
STATED RANGE
MOST EFFECTIVE RANGE
0-200 lb in.
(0-23 Nm)
50-150 Ib in.
(6-17 Nm)
0-600 lb ft
(0-813 Nm)
50-450 Ib ft
(68-610 Nm)
0-170 lb ft
(0-230 Nm)
44-131 Ib ft
(60-178 Nm)
15-75 lb ft
(20-102 Nm)
30-60 Ib ft
(41-81 Nm)
