Case 621F, Service Manual

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1001-3
TORQUE SPECIFICATIONS - DECIMAL HARDWARE
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 graphities, Molydisulfide
greases, or other extreme pressure lubricants are
used.
Grade 5 Bolts, Nuts, and Studs
Size
Pound-
Inches
Newton
metres
1/4 inch 108 to 132 12 to 15
5/16 inch 204 to 252 23 to 28
3/8 inch 420 to 504 48 to 57
Size
Pound-
Feet
Newton
metres
7/16 inch 54 to 64 73 to 87
1/2 inch 80 to 96 109 to 130
9/16 inch 110 to 132 149 to 179
5/8 inch 150 to 180 203 to 244
3/4 inch 270 to 324 366 to 439
7/8 inch 400 to 480 542 to 651
1.0 inch 580 to 696 787 to 944
1-1/8 inch 800 to 880 1085 to 1193
1-1/4 inch 1120 to 1240 1519 to 1681
1-3/8 inch 1460 to 1680 1980 to 2278
1-1/2 inch 1940 to 2200 2631 to 2983
Grade 8 Bolts, Nuts, and Studs
Size
Pound-
Inches
Newton
metres
1/4 inch 144 to 180 16 to 20
5/16 inch 288 to 348 33 to 39
3/8 inch 540 to 648 61 to 73
Size
Pound-
Feet
Newton
metres
7/16 inch 70 to 84 95 to 114
1/2 inch 110 to 132 149 to 179
9/16 inch 160 to 192 217 to 260
5/8 inch 220 to 264 298 to 358
3/4 inch 380 to 456 515 to 618
7/8 inch 600 to 720 814 to 976
1.0 inch 900 to 1080 1220 to 1465
1-1/8 inch 1280 to 1440 1736 to 1953
1-1/4 inch 1820 to 2000 2468 to 2712
1-3/8 inch 2380 to 2720 3227 to 3688
1-1/2 inch 3160 to 3560 4285 to 4827
NOTE:
Use thick nuts with Grade 8 bolts.