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TORQUE SPECIFICATIONS FOR
STANDARD MACHINE HARDWARE
SIZE
8-32
8-36
1 O-24
1 O-32
1/4-20
1/4-28
5/1 6-l 8
5/1 6-24
3/8-1 6
3/8-21
7/16-14
7/1 6-20
1/2-13
1/2-20
9/16-12
9/1 6-l 8
5/8-1 1
5/8-1 8
3/4-1 0
3/4-1 6
7/8-9
7/8-14
1-8
1-12
1. These torque values are to be used for all hardware excluding: locknuts,
self-tapping screws, thread forming screws, sheet metal screws and socket
head setscrews.
2. Recommended seating torque values for locknuts:
a. for prevailing torque locknuts - use 65% of grade 5 torques.
b. for flange whizlock nuts and screws - use 135% of grade 5 torques.
3. Unless otherwise noted on assembly drawings, all torque values must meet
this specification.
(Tolerance 2 20%)
SAE GRADE #2
SAE GRADE #5
0
in/lbs
Mbs
Nm.
M b s
19
2.1
30
20
2.3
31
27
3.1
43
31
3.5
49
66
7.6
8
76
8.6
10
11
15.0
17
12
16.3
19
20
27.2
30
23
31.3
35
30
40.8
50
35
47.6
55
50
68.0
75
55
74.8
90
65
88.4
110
75
102.0
120
90
122.4
150
100
136
180
160
217.6
260
180
244.8
300
140
190.4
400
155
210.8
440
220
299.2
580
240
326.4
640
NOTES
18
SAE GRADE #8
in/lbs
N m .
Mbs
Nm.
3.4
41
4.6
3.5
43
4.9
4.9
60
6.8
5.5
68
7.7
10.9
12
16.3
13.6
14
19.0
23.1
25
34.0
25.8
27
34.0
40.8
45
61.2
47.6
50
68.0
68.0
70
95.2
74.8
80
108.8
102.0
110
149.6
122.4
120
163.2
149.6
150
204.0
163.2
1 7 0 2 3 1 . 2
204.0
2 2 0
2 9 9 . 2
244.8
2 4 0 3 2 6 . 4
353.6
386
525
408.0
4 2 0 5 7 1 . 2
544.0
600
816.0
598.4
660
897.6
788.8
9 0 0
1,2443.0
870.4
1 , 0 0 0 1,360.0
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