TM 5-3825-270-23&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.
1. Table 2 provides torque limits for SAE standard fasteners.
2. Table 3 provides torque limits for metric fasteners.
2. Unless otherwise indicated, standard torque tolerance shall be 10 percent.
3. Torque values listed 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
NOTE
If replacement capscrews are of higher grade than originally supplied, use torque
specifications for the original. This will prevent equipment damage due to overtorquing
When torquing a fastener, select a wrench whose range fits the required torque value. A torque wrench is most
accurate from 25 to 75 percent of its stated range. A wrench with a stated range of 0 to 100 Ib-ft (0 to 136 Nm) will
be most accurate from 25 to 75 Ib-ft (34 to 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.
MOST EFFECTIVE RANGE
STATED RANGE
0 to 200 Ib-in.
(0 to 23 Nm)
50 to 150 Ib-in.
(6 to 17 Nm)
0 to 600 lb-ft
(0 to 813 Nm)
50 to 450 lb-ft
(68 to 610 Nm)
0 to 170 lb-ft
(0 to 230 Nm)
44 to 131 lb-ft
(60 to 178 Nm)
15 to 75 lb-ft
(20 to 102 Nm)
30 to 30 lb-ft
(41 to 81 Nm)
