McFarlane RD-4020 - Bolt and Tire Torque Specifications

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BOLT TORQUE SPECIFICTIONS
Coarse Thread Series Fine Thread Series
Nut Size
and
Threads
per Inch
Nut
Tightening
Torque
(lb.ft.)
Nut Size
and
Threads
per Inch
Nut
Tightening
Torque
(lb.ft.)
Grade C Nuts Grade C Nuts
Max. Min. Max. Min.
1/4 - 20 14.7 10 1/4 - 28 14.7 10
5/16 - 18 22.3 15.2 5/16 - 24 23.4 18.4
3/8 - 16 39 28 3/8 - 24 41 30
7/16 - 14 60 44 7/16 - 20 60 44
1/2 - 13 88 63 1/2 - 20 98 70
9/16 - 12 134 98 9/16 - 18 134 98
5/8 - 11 172 127 5/8 - 18 176 127
3/4 - 10 295 218 3/4 - 16 295 218
7/8 - 9 440 317 7/8 - 14 440 317
1 - 8 651 506 1 - 14 703 610
TIRE & LUG TORQUE SPECIFICTIONS
Tire Size
Ply
Rating
Tire
Pressure Lug Size
Lug
Tightening
Torque (lb.ft.)
Max. Min.
18.5X8.5-8 6 ply 50 psi ½ nut 85 75
7.60-15 8 ply 52 psi ½ x 1 85 75
9.5L-15 8 ply 44 psi ½ x 1 85 75
11L-15 8 ply 36 psi ½ x 1 85 75
12.5L-15 10 ply 44 psi 9/16 x 1 80 90
12.5L-15 12 ply 52 psi 9/16 x 1 80 90
12.5L-15 18 ply 72 psi 5/8 nut 85 100
12.5L-15 F ply 90 psi 5/8 nut 85 100
36x16-17.5 14 ply 75 psi 5/8 nut 85 100