TM 5-3810-295-34
Table 1-2.
General Torque Values for Engines
5
8
Torque
Torque
SAE grade no.
body size
minimum
maximum
minimum
maximum
Nm
Nm
Nm
Nm
inches
ft-lb
ft-lb
ft-lb
ft-lb
9
12
10
14
12
16
14
19
5/16
19
26
21
28
27
37
30
41
3/8
33
45
37
50
45
61
50
68
7/16
53
72
60
81
75
102
85
115
80
108
90
122
115
156
130
176
9/16
115
156
130
176
160
217
180
244
5/8
160
217
180
244
220
298
250
339
290
393
320
434
400
542
450
610
7/8
420
569
470
637
650
881
730
990
1
630
854
710
963
970
1315
1090
1478
11/8
850
1152
950
1288
1380
1871
1550
2101
1
1200
1627
1350
1830
1940
2630
2180
2956
1
2000
2712
2300
3118
3300
4474
3700
5016
1
3300
4474
3700
5016
5300
7185
6000
8135
2
5000
6779
5500
7457
8000
10846
9000
12202
Bolt Identification Guide
SAE grade no.
5 Will have three equally spaced radial lines. Quenched and tempered carbon steel.
8 Will have six equally spaced radial lines. Quenched and tempered medium carbon alloy or medium carbon steel.
Notes for table 1-2
1. U minimum torque values when bolts and nuts are reused during servicing.
2. Toque values listed are for rigid joints without gasket or compressable material.
3. Listed torque values are for threads lubricated with engine oil or chassis grease. When other lubricants or materials
are used, multiply standard assembly torques by the following factors:
a. 0.85 when metallic plated bolts or nuts are used.
b. 0.70 when Molykote, white lead or similar mixtures as used lubricants.
c. 0.90 when hardened surfaces are used under the nut or bolt head.
d. 1.20 when Loctite is used on the threads of standard bolts and nuts.
e. 1.25 when taper head bolts a used (with bolt head torque
f. 1.40 when Loctite is used on taper head bolt threads (with bolt head tourqued).
1-4
