Case 721G Stage IV, Operator'S Manual

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8 - SPECIFICATIONS
Torque charts
Use the torques in this chart when special torques are not given. These torques apply to fasteners with both UNC
and UNF threads as received from suppliers dry, or when lubricated with engine oil. Not applicable if special graphite
lubricants, Molydisulfide greases, or other extreme pressure lubricants are used.
Decimal hardware
Grade 5 bolts, nuts, and studs
Size Nm lb in/lb ft
1/4 in 12 – 15 Nm 108 – 132 lb in
5/16 in 23 – 28 Nm 204 – 252 lb in
3/8 in 48 – 57 Nm 420 – 504 lb in
7/16 in 73 – 87 Nm 54 – 64 lb ft
1/2 in 109 – 130 Nm 80 – 96 lb ft
9/16 in 149 – 179 Nm 110 – 132 lb ft
5/8 in
203 – 244 Nm
150 – 180 lb ft
3/4 in 366 – 439 Nm 270 – 324 lb ft
7/8 in 542 – 651 Nm 400 – 480 lb ft
1 in 787 – 944 Nm 580 – 696 lb ft
1-1/8 in 1085 – 1193 Nm 800 – 880 lb ft
1-1/4 in
1519 – 1681 Nm
1120 – 1240 lb ft
1-3/8 in 1980 – 2278 Nm 1460 – 1680 lb ft
1-1/2 in 2631 – 2983 Nm 1940 – 2200 lb ft
Markings for Grade 5 hardware
Grade 8 bolts, nuts, and studs
Size Nm lb in/lb ft
1/4 in 16 – 20 Nm 144 – 180 lb in
5/16 in
33 – 39 Nm 288 – 348 lb in
3/8 in 61 – 73 Nm 540 – 648 lb in
7/16 in 95 – 114 Nm 70 – 84 lb ft
1/2 in 149 – 179 Nm 110 – 132 lb ft
9/16 in 217 – 260 Nm 160 – 192 lb ft
5/8 in 298 – 358 Nm 220 – 264 lb ft
3/4 in 515 – 618 Nm 380 – 456 lb ft
7/8 in 814 – 976 Nm 600 – 720 lb ft
1 in 1220 – 1465 Nm
900 – 1080 lb ft
1-1/8 in 1736 – 1953 Nm 1280 – 1440 lb ft
1-1/4 in 2468 – 2712 Nm 1820 – 2000 lb ft
1-3/8 in 3227 – 3688 Nm 2380 – 2720 lb ft
1-1/2 in 4285 – 4827 Nm 3160 – 3560 lb ft
Markings for Grade 8 hardware
NOTE: use thick nuts with Grade 8 bolts.
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