Box Snow Blower January 2013
Owner’s Manual and Parts List
Page 16 of 28 Holder tractors Inc. www.holdertractors.ca
BOLT TORQUE SPECIFICATIONS
Bolt Coarse Grade 5 Grade 8
SizeThread*
Inches per Inch Torque in foot pounds
1/4 20 10 14
5/16 18 19 29
3/8 16 33 47
7/16 14 54 78
1/2 13 78 119
9/16 12 114 169
5/8 11 154 230
3/4 10 257 380
7/8 9 382 600
1 8 587 700
1-1/8 7 794 1430
1-1/4 7 1105 1975
1-3/8 6 1500 2650
1-1/2 6 1775 3200
To determine the torque for a fine-thread bolt, increase rating by 9%.
All torques are measured on dry standard bolts.
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