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SIZE
8-32
8-36
10-24
10-32
1/4-20
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
7/16-14
7/16-20
1/2-13
1/2-20
9/16-12
9/16-18
5/8-11
5/8-18
3/4-10
3/4-16
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.
TORQUE SPECIFICATIONS FOR
STANDARD MACHINE HARDWARE
(Tolerance ± 20%)
SAE GRADE #2
in/lbs
ft/lbs
Nm.
19
2.1
20
2.3
27
3.1
31
3.5
66
7.6
76
8.6
11
15.0
12
16.3
20
27.2
23
31.3
30
40.8
35
47.6
50
68.0
55
74.8
65
88.4
75
102.0
90
122.4
100
136
160
217.6
180
244.8
140
190.4
155
210.8
220
299.2
240
326.4
NOTES
29
Torque Specifications
SAE GRADE #5
in/lbs
ft/lbs
Nm.
30
3.4
31
3.5
43
4.9
49
5.5
8
10.9
10
13.6
17
23.1
19
25.8
30
40.8
35
47.6
50
68.0
55
74.8
75
102.0
90
122.4
110
149.6
120
163.2
150
204.0
180
244.8
260
353.6
300
408.0
400
544.0
440
598.4
580
788.8
640
870.4
SAE GRADE #8
in/lbs
ft/lbs
Nm.
41
4.6
43
4.9
60
6.8
68
7.7
12
16.3
14
19.0
25
34.0
27
34.0
45
61.2
50
68.0
70
95.2
80
108.8
110
149.6
120
163.2
150
204.0
170
231.2
220
299.2
240
326.4
386
525
420
571.2
600
816.0
660
897.6
900
1,244.0
1,000
1,360.0
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