TM 5-3825-226-24
GENERAL TIGHTENING TORQUE FOR
BOLTS, NUTS AND TAPERLOCK STUDS
The following charts give the standard torque values for bolts, nuts
and taperlock studs of SAE Grade 5 or better quality. Exceptions are
given in other sections of the Service Manual where needed.
THREAD DIAMETER
STANDARD TORQUE
inches
millimeters
lb. ft.
N.m*
Use these torques for bolts and nuts with stan-
dard threads (conversions are approximate).
1/4
6.35
9 ± 3
12 ± 4
5/16
7.94
18 ± 5
25 ±7
3/8
9.53
32 ± 5
45 ± 7
7/16
11.11
50 ± 10
70 ± 15
1/2
12.70
75 ± 10
100 ± 15
9/16
14.29
110 ± 15
150 ± 20
5/8
15.88
150 ± 20
200 ± 25
3/4
19.05
265 ± 35
360 ± 50
7/8
22.23
420 ± 60
570 ± 80
1
25.40
640 ± 80
875 ± 100
1 1/8
28.58
800 ± 100
1100 ± 150
1 1/4
31.75
1000 ± 120
1350 ± 175
1 3/8
34.93
1200 ± 150
1600 ± 200
1 1/2
38.10
1500 ± 200
2000 ± 275
Use these torques for bolts and nuts on
hydraulic valve bodies.
5/16
7.94
13 ± 2
20 ± 3
3/8
9.53
24 ± 2
35 ± 3
7/16
11.11
39 ± 2
50 ±3
1/2
12.70
60 ± 3
80 ± 4
5/8
15.88
118 ± 4
160 ± 6
Use these torques for studs with Taperlock threads.
1/4
6.35
5 ± 2
7 ± 3
5/16
7.94
10 ± 3
15 ± 5
3/8
9.53
20 ± 3
30 ± 5
7/16
11.11
30 ± 5
40 ± 10
1/2
12.70
40 ± 5
55 ± 10
9/16
14.29
60 ± 10
80 ± 15
5/8
15.88
75 ± 10
100 ± 15
3/4
19.05
110 ± 15
150 ± 20
7/8
22.23
170 ± 20
230 ± 30
1
25.40
260 ± 30
350 ± 40
1 1/8
28.58
320 ± 30
400 ± 40
1 1/4
31.75
400 ± 40
550 ± 50
1 3/8
34.93
480 ± 40
650 ± 50
1 1/2
38.10
550 ± 50
750 ± 70
*1 newton meter (N.m) is approximately the same as 0.1 mkg.
T95416-7
1-60
