Unified Inch Bolt And Screw Torque Values - Worldwide Construction And Forestry Division 380GLC Operator's Manual

Unified Inch Bolt and Screw Torque Values

TS1671 —UN—01MAY03
SAE Grade 1
c
Bolt or Screw Hex Head
Size
N·m lb·in
1/4 3.1 27.3
6.1 54.1
5/16
3/8 10.5 93.6
16.7 148
7/16
N·m lb·ft
1/2 25.9 19.1
9/16 36.7 27.1
5/8 51 37.6
89.5 66
3/4
7/8 144 106
1 216 159
1-1/8 305 225
1-1/4 427 315
564 416
1-3/8
1-1/2 743 548
The nominal torque values listed are for general use only with the assumed
wrenching accuracy of 20%, such as a manual torque wrench.
DO NOT use these values if a different torque value or tightening procedure is
given for a specific application.
For lock nuts, for stainless steel fasteners, or for nuts on U-bolts, see the
tightening instructions for the specific application.
•
Make sure that fastener threads are clean.
•
Apply a thin coat of Hy-Gard™ or equivalent oil under the head and on the threads of the fastener, as shown in the following image.
•
Be conservative with the amount of oil to reduce the potential for hydraulic lockup in blind holes due to excessive oil.
•
Properly start thread engagement.
TS1741 —UN—22MAY18
a
Grade 1 applies for hex cap screws over 6 in (152 mm) long, and for all other types of bolts and screws of any length.
b
Grade 2 applies for hex cap screws (not hex bolts) up to 6 in (152 mm) long.
c
Hex head column values are valid for ISO 4014 and ISO 4017 hex head, ISO 4162 hex socket head, and ISO 4032 hex nuts.
d
Hex flange column values are valid for ASME B18.2.3.9M, ISO 4161, or EN 1665 hex flange products.
Miscellaneous—Machine
a
SAE Grade 2
c
Flange Hex Head
d
Head
N·m lb·in N·m lb·in
3.2 28.4 5.1 45.5
6.5 57.7 10.2 90.2
11.5 102 17.6 156
N·m lb·ft
18.4 163 27.8 20.5
N·m lb·ft
28.2 20.8 43.1 31.8
40.5 29.9 61.1 45.1
55.9 41.2 85 62.7
98 72.3 149 110
157 116 144 106
236 174 216 159
335 247 305 225
469 346 427 315
618 456 564 416
815 601 743 548
4-1-19
b
SAE Grade 5, 5.1 or 5.2
c
Flange Hex Head
d
Head
N·m lb·in N·m lb·in
5.3 47.3 7.9 70.2
10.9 96.2 15.7 139
N·m lb·ft
19.2 170 27.3 20.1
N·m lb·ft
30.6 22.6 43 31.7
47 34.7 66.6 49.1
67.5 49.8 94.6 69.8
93.1 68.7 131 96.9
164 121 230 170
157 116 370 273
236 174 556 410
335 247 685 505
469 346 957 706
618 456 1264 932
815 601 1665 1228
Replace fasteners with the same or higher property class. If
higher property class fasteners are used, tighten these to the
strength of the original.
SAE Grade 8 or 8.2
c
Flange Hex Head
d
Head
N·m lb·in N·m lb·in
8.3 73.1 11.2 99.2
N·m lb·ft
16.8 149 22.2 16.4
N·m lb·ft
29.7 21.9 38.5 28.4
47.3 34.9 60.6 44.7
72.8 53.7 94 69.3
104 77 134 98.5
144 106 186 137
252 186 325 240
405 299 522 385
609 449 785 579
751 554 1110 819
1051 775 1552 1145
1386 1022 2050 1512
1826 1347 2699 1991
DX,TORQ1 -19-30MAY18-1/1
Flange
d
Head
N·m lb·in
11.6 103
N·m lb·ft
23.7 17.5
41.9 30.9
66.8 49.3
103 75.8
148 109
203 150
357 263
572 422
860 634
1218 898
1703 1256
2248 1658
2962 2185
092221
PN=204