TM 9--2350--292--20--2
0720 00--2
TORQUE LIMITS -- CONTINUED
0720 00
HOW TO USE TORQUE TABLE -- CONTINUED
CAPSCREW HEAD MARKINGS
Manufacturer’s marks may vary.
These are all SAE Grade 5 (3 line)
e. To find the grade screw you are installing, match the markings on the head to the correct picture of CAPSCREW
HEAD MARKINGS on the torque table.
f. Look down the column under the picture you found in step e. until you find the torque limit (in lb--ft or N m) for the
diameter and threads per inch of the screw you are installing.
Table 1. Torque Limits for Dry Fasteners
SAE CAPSCREW HEAD MARK-
INGS
SIZE
TORQUE
SAE GRADE
No. 1 or 2
SAE GRADE
No. 5
SAE GRADE
No. 6 or 7
SAE GRADE
No. 8
DIA.
INS.
THREADS
PER INCH
MMs
POUND--
FEET
N m
POUND--
FEET
N m
POUND--
FEET
N m
POUND--
FEET
N m
1/4
20
6.35
5
6.78
8.0
10.85
10
13.56
12.0
16.27
1/4
28
6.35
6
8.14
10.0
13.56
—
—
14.0
18.98
5/16
18
7.94
11
14.92
17.0
23.05
19
25.76
24.0
32.52
5/16
24
7.94
13
17.63
19.0
25.76
—
—
27.0
36.61
3/8
16
9.53
18
24.41
31.0
42.04
34
46.10
44.0
59.66
3/8
24
9.53
20
27.12
35.0
47.46
—
—
49.0
66.44
7/16
14
11.11
28
37.97
49.0
66.44
55
74.58
70.0
94.92
7/16
20
—
30
40.68
55.0
74.58
—
—
78.0
105.77
1/2
13
12.70
39
52.88
75.0
101.70
85
115.26
105.0
142.38
1/2
20
—
41
55.60
85.0
115.26
—
—
120.0
162.78
9/16
12
14.29
51
69.16
110.0
149.16
120
162.72
155.0
210.18
9/16
18
—
55
74.58
120.0
162.72
—
—
170.0
230.52
5/8
11
15.88
63
85.43
150.0
203.40
167
226.45
210.0
284.76
5/8
18
—
95
128.82
170.0
230.52
—
—
240.0
325.44
3/4
10
19.05
105
142.38
270.0
366.12
280
379.68
375.0
508.50
3/4
16
—
115
155.94
295.0
400.02
—
—
420.0
596.52
7/8
9
22.23
160
216.96
395.0
535.62
440
596.64
605.0
820.38
7/8
14
—
175
237.30
435.0
589.86
—
—
675.0
915.30
1
8
25.40
235
318.66
590.0
800.04
660
894.96
910.0
1233.96
1
14
—
250
339.00
660.0
894.96
—
—
990.0
1342.44
1--1/8
—
25.58
—
—
800.0
1064.8
—
—
1280.0
1735.7
880.0
1193.3
1440.0
1952.8
1--1/4
—
31.75
—
—
—
—
—
—
1820.0
2467.9
—
—
2000.0
2712.0
1--3/8
—
34.93
—
—
1460.0
1979.8
—
—
2380.0
3227.3
1680.0
2278.1
2720.0
3688.3
1--1/2
—
38.10
—
—
1940.0
2630.6
—
—
3160.0
4285.0
2200.0
2983.2
3560.0
4827.4
