Bolt Torque Chart - J&M 32 Series Operator's Manual

Always tighten hardware to these values unless a different torque or tightening procedure is listed for specific application.
Fasteners must always be replaced with the same grade as specified in the manual parts list.
Always use the proper tool for tightening hardware. SAE for SAE hardware and Metric for Metric hardware.
Make sure fastener threads are clean and you start thread engagement properly.
Nominal Threads
Dia. (Inch) Per
Inch
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
Nominal Pitch
Dia. (Inch)
5
6
7
8
10
12
14
16
18
20
22
24
27
30
33
36

Bolt Torque Chart

SAE J429 Grade 2
Clamp Load Tightening
(Lbs.) Torque
K = 0.18
Unified Coarse Thread Series
20 1313 59 in-lbs.
18 2163 122
16 3196 18 ft-lbs.
14 4385 29
13 5853 44
11 9323 87
10 13797 155
9 11428 150
8 14992 225
28 1500 68 in-lbs.
24 1395 135
24 3623 20 ft-lbs.
20 4897 32
20 6598 49
18 10558 99
16 15385 173
14 12609 165
14 16827 252
Class 8.8
Clamp Load Tightening
(Lbs.) Torque
K = 0.18
Metric Fasteners
0.8 1387 4.1
1 1968 7.0
1 2822 11.7
1.25 3580 16.9
1.5 5671 33.5
1.75 8240 58.4
2 11289 93.3
2 15320 144.7
2.5 18822 200.0
2.5 23938 282.7
2.5 29669 385.4
3 34471 488.4
3 44924 716.1
3.5 54819 970.9
3.5 67821 1321.4
4 79866 1697.5
SAE J429 Grade 5
Clamp Load Tightening
(Lbs.) Torque
K = 0.18
2029 90 in-lbs.
3342 188
4940 28 ft-lbs.
6777 44
9046 68
14408 135
21322 240
29436 386
38616 579
Fine Thread Series
2319 104 in-lbs.
3702 208
5599 31 ft-lbs.
7568 50
10197 76
16317 153
23776 267
32479 426
43343 650
Class 10.9
Clamp Load Tightening
(Lbs.) Torque
K = 0.18
1985 5.9
2816 10.0
4039 16.7
5123 24.2
8115 47.9
11792 83.5
16154 133.5
21924 207.1
26934 286.2
34256 404.5
42457 551.5
49329 699
64288 1024.8
78448 1389.5
97055 1890.9
114291 2429.2
SAE J429 Grade 8
Clamp Load Tightening
(Lbs.) Torque
K = 0.18
2864 129 in-lbs.
4719 265
6974 39 ft-lbs.
9568 63
12771 96
20340 191
30101 339
41556 545
54517 818
3274 147 in-lbs.
5226 294
7905 44 ft-lbs.
10684 70
14396 108
23036 216
33566 378
45853 602
61190 918
TIGHTENING WHEEL NUTS
Standard 3/4" wheel studs and nuts
should be tightened to torque 400
Ft.-Lbs and standard 22mm studs
should be tightened to torque 640
Ft.-Lbs. during initial operation of
the grain cart and then checked for
proper torque after every 10 hours
of use. Failure to do so may damage
wheel nut seats. Once seats are
damaged, it will become impossible
to keep nuts tight.
9