TM 10-4520-262-12&P 0069 00
SPACE HEATER CONVECTIVE (SHC)
TORQUE LIMITS
0069 00-1
GENERAL
This work package provides general torque limits for fasteners. Special torque values are indicated in the
maintenance procedures for applicable components. The general torque values given in this work
package shall be used when specific torque values are not indicated in the maintenance procedures.
TORQUE LIMITS
Torque limits are listed in Tables 1 and 2 for fasteners. Dry fasteners are defined as fasteners on which
no lubricants are applied to the threads. Wet fasteners are defined as fasteners on which graphite, moly-
disulphide greases, or other extreme pressure lubricants are applied to the threads. Table 3 lists the
minimum breakaway torque values for locknuts.
Table 1. General Torque Requirements for Dry Fasteners (#2 through #10)*
Torque Requirements in in.-lb (N-m)
Bolt/Screw
Size
18-8 Stainless
Steel
Brass
Silicon
Bronze
Aluminum
2024-T4
316 Stainless
Steel
Monel
Nylon**
2-56
2-64
2.5 (0.28)
3.0 (0.34)
2.0(0.23)
2.5 (0.28)
2.3 (0.26)
2.8 (0.32)
1.4 (0.16)
1.7 (0.19)
2.6 (0.29)
3.2 (0.36)
2.5 (0.28)
3.1 (0.35)
0.44 (0.5)
3-48
3-56
3.9 (0.44)
4.4 (0.50)
3.2 (0.36)
3.6 (0.48)
3.6 (0.41)
4.1 (0.46)
2.1 (0.24)
2.4 (0.27)
4.0 (0.45)
4.6 (0.52)
4.0 (0.45)
4.5 (0.51)
4-40
4.48
5.2 (0.59)
6.6 (0.75)
4.3 (0.49)
5.4 (0.61)
4.8 (0.54)
6.1 (0.69)
2.9 (0.33)
3.6 (0.41)
5.5 (0.62)
6.9 (0.78)
5.3 (0.60)
6.7 (0.76)
1.19 (0.13)
5-40
5-44
7.7 (0.87)
9.4 (1.06)
6.3 (0.71)
7.7 (0.87)
7.1 (0.80)
8.7 (0.98)
4.2 (0.48)
5.1 (0.58)
8.1 (0.92)
9.8 (1.11)
7.8 (0.88)
9.6 (1.09)
6-32
6-40
9.6 (1.09)
12.1 (1.37)
7.9 (0.89)
9.9 (1.12)
8.9 (1.01)
11.2 (1.27)
5.3 (0.60)
6.6 (0.75)
10.1 (1.14)
12.7 (1.44)
9.8 (1.11)
12.3 (1.39)
2.14 (0.24)
8-32
8-36
19.8 (2.24)
22.0 (2.49)
16.2 (1.83)
18.0 (2.03)
18.4 (2.08)
20.4 (2.31)
10.8 (1.22)
12.0 (1.36)
20.7 (2.34)
23.0 (2.60)
20.2 (2.28)
22.4 (2.53)
4.3 (0.49)
10-24
10-32
22.8 (2.58)
31.7 (3.58)
18.6(2.10)
25.9 (2.93)
21.2 (2.40)
29.3 (3.31)
13.8 (1.56)
19.2 (2.17)
23.8 (2.69)
33.1 (3.74)
25.9 (2.93)
34.9 (3.94)
6.61 (0.75)
8.2 (0.93)
* Torque given is for clean, dry threads. Reduce by 10% when lubricated.
** Nylon values only are breaking torque, rather than safe working torque.
