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TECHNICAL DATA
Standard 1/4" fasteners 9 ft/lb
Standard 5/16" fasteners 18 ft/lb
Standard 3/8" fasteners 33 ft/lb
Standard 7/16" fasteners 52 ft/lb
Standard 1/2" fasteners 80 ft/lb
HEX HEAD CAP SCREWS
The torque values shown must be used as a general guideline
when specic torque values are not given.
U.S. Standard Hardware
Grade SAE Grade 5 SAE Grade 8 Flangelock Screw
w/Flangelock Nut
Size ft./lbs Nm ft./lbs Nm ft./lbs Nm
Shank Size (Diameter in inches,
ne or coarse thread)
1/4 9 12 13 18
5/16 18 24 28 38 24 33
3/8 31 42 46 62 40 54
7/16 50 68 75 102
1/2 75 102 115 156
9/16 110 149 165 224
5/8 150 203 225 305
3/4 250 339 370 502
7/8 378 512 591 801
1-1/8 782 1060 1410 1912
** Grade 5 - Minimum commercial quality (lower quality not recommended)
Metric Standard Hardware
Grade Grade 8.8 Grade 10.9 Grade 12.9
Size ft./lbs Nm ft./lbs Nm ft./lbs Nm
Shank Size (Diameter in inches, ne or
coarse thread)
M4 1.5 2 2.2 3 2.7 3.7
M5 3 4 4.5 6 5.2 7
M6 5.2 7 7.5 10 8.2 11
M7 8.2 11 12 16 15 20
M8 13.5 18 18.8 25 21.8 30
M10 24 33 35.2 48 43.5 59
M12 43.5 59 62.2 84 75 102
M14 70.5 96 100 136 119 161
M16 108 146 147 199 176 239
M18 142 193 202 274 242 328
M20 195 264 275 373 330 447
M22 276 374 390 529 471 639
M24 353 478 498 675 596 808
M27 530 719 735 996 904 1226
Engine crankshaft bolt 50 ft/lb
Deck pulley bolts 150 ft/lb
Lug nuts 75 ft/lb
Blade bolt 90 ft/lb
Torque Specications
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