TM 9--2520--215--34
0086 00--2
TORQUE LIMITS AND STUD SELECTION – CONTINUED
0086 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 CAPS CREW
HEAD MARKINS 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
MARKINGS
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
10.0
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
19.0
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
34.0
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
55.0
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
85.0
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
120.0
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
167.0
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
280.0
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
440.0
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
660.0
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
