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Introduction - Section 1
Page 1-14
GRADE 5
CAP-
TORQUE -- GRADE 5
SCREW
THREAD
ft. lbs.
kg.m
SIZE
1/4--20
7
0.97
1/4--28
8
1.11
5/16--18
15
2.07
5/16--24
16
2.21
3/8--16
25
3.46
3/8--24
30
4.15
7/16--14
40
5.5
7/16--20
45
6.2
1/2--13
65
9
1/2--20
70
9.7
9/16--12
90
12.4
9/16--18
95
13.1
5/8--11
125
17.3
5/8--18
135
18.7
3/4--10
220
30.4
TABLE XII -- Standard Assembly
Torques For 12-Point, Grade 9,
Capscrews (SAE)
The following specifications appy to required assembly
torques for all 12-Point, Grade 9 (170,000 psi minimum
tensile), Capscrews.
• Capscrew threads and seats SHALL be lubricated
when assembled.
Unless instructions specifically recommend oth-
erwise, these standard torque values are to be
used with simple lithium base chassis grease
(multi-purpose EP NLGI) or a rust- preventive
grease (see list, this page) on the threads.
• Torques are calculated to give a clamping force
of approximately 75% of proof load.
• The maximum torque tolerance shall be ± 10% of
the torque value shown.
TABLE XI
STANDARD TORQUE CHART
SAE HEX HEAD CAPSCREW AND NUT ASSEMBLY
(LUBRICATED THREADS)
TOLERANCES
TORQUE -- GRADE 8
N.m
ft. lbs.
kg.m
N.m
9.5
10
1.38
13.6
10.8
11
1.52
14.9
20.3
21
2.90
28
22
22
3.04
30
34
35
4.84
47
41
40
5.5
54
54
58
8.0
79
61
62
8.57
84
88
90
12.4
122
95
95
13.1
129
122
125
17.3
169
129
135
18.7
183
169
175
24.2
237
183
190
26.2
258
298
310
42.8
420
1 ft. lbs. = 0.138 kg.m = 1.356 N.m
±
10%
TORQUE -- GRADE 5
CAPSCREW
THREAD
ft. lbs.
kg.m
SIZE
3/4--16
235
32.5
7/8--9
350
48.4
7/8--14
375
51.9
1.0--8
525
72.6
1.0--12
560
77.4
1.0--14
570
78.8
1 1/8--7
650
89.9
1 1/8--12
700
96.8
1 1/4--7
910
125.9
1 1/4--12
975
134.8
1 3/8--6
1200
166
1 3/8--12
1310
181
1 1/2--6
1580
219
1 1/2--12
1700
235
TABLE XII - STANDARD ASSEMBLY TORQUE
for 12-Point, Grade 9, Capscrews
CAPSCREW
TORQUE
SIZE*
ft. lbs.
0.250 - 20
12
0.312 - 18
24
0.375 - 16
42
0.438 - 14
70
0.500 - 13
105
0.562 - 12
150
0.625 - 11
205
0.750 - 10
360
0.875 - 9
575
1.000 - 8
860
1.000 - 12
915
1.125 - 7
1230
1.125 - 12
1330
1.250 - 7
1715
1.250 - 12
1840
1.375 - 6
2270
1.375 - 12
2475
1.500 - 6
2980
1.500 - 12
3225
* Shank Diameter (in.) - Threads per in.
This Table represents standard values only.
Do not use these values to replace torque values which are
specified in assembly instructions.
OM1006.2
Standard Charts and Tables
GRADE 8
TORQUE -- GRADE 8
N.m
ft. lbs.
kg.m
N.m
319
335
46.3
454
475
500
69.2
678
508
530
73.3
719
712
750
103.7
1017
759
790
109.3
1071
773
800
110.6
1085
881
1050
145
1424
949
1140
158
1546
1234
1480
205
2007
1322
1580
219
2142
1627
1940
268
2630
1776
2120
293
2874
2142
2560
354
3471
2305
2770
383
3756
TORQUE
TORQUE
N.m
kg.m
16
1.7
33
3.3
57
5.8
95
9.7
142
14.5
203
20.7
278
28.3
488
49.7
780
79.4
1166
119
1240
126
1670
170
1800
184
2325
237
2495
254
3080
313
3355
342
4040
411
4375
445
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