Other Torque Specifications; Sae Grade 8 Steel Set Screws; Thread Cutting Screws (Zinc Plated Steel); Conversion Factors - Toro 260 Series Service Manual

SPECIFICATIONS

Other Torque Specifications

SAE Grade 8 Steel Set Screws

Thread Size
Square Head
1/4 - 20 UNC 140 ± 20 in-lb
5/16 - 18 UNC 215 ± 35 in-lb
3/8 - 16 UNC 35 ± 10 ft-lb
1/2 - 13 UNC 75 ± 15 ft-lb
Thread Cutting Screws
(Zinc Plated Steel)
Type 1, Type 23, or Type F
Thread Size
No. 6 - 32 UNC
No. 8 - 32 UNC
No.10 - 24 UNC
1/4 - 20 UNC
5/16 - 18 UNC
3/8 - 16 UNC

Conversion Factors

in-lb X 11.2985 - N-cm
ft-lb X 1.3558 = N-m
1 - 8
Recommended Torque
Hex Socket
73 ± 12 in-lb
145 ± 20 in-lb
18 ± 3 ft-lb
50 ± 10 ft-lb
Baseline Torque*
20 ± 5 in-lb
30 ± 5 in-lb
38 ± 7 in-lb
85 ± 15 in-lb
110 ± 20 in-lb
200 ± 100 in-lb

Wheel Bolts and Lug Nuts

Thread Size
7/16 - 20 UNF
65 ± 10 ft-lb
Grade 5
1/2 - 20 UNF
80 ± 10 ft-lb
Grade 5
M12 X 1.25
80 ± 10 ft-lb
Class 8.8
M12 X 1.5
80 ± 10 ft-lb
Class 8.8
** For steel wheels and non-lubricated fasteners.
Thread Cutting Screws
(Zinc Plated Steel)
Threads per Inch
Thread
Size
Type A Type B
No. 6 18
No. 8 15
No. 10 12
No. 12 11
* Hole size, material strength, material thickness and
finish must be considered when determining specific
torque values. All torque values are based on non-
lubricated fasteners.
N-cm X - 0.08851 = in-lb
N-cm X 0.73776 - ft-lb
260 Series Tractor Service Manual
Recommended Torque**
88 ± 14 N-m
108 ± 14 N-m
108 ± 14 N-m
108 ± 14 N-m
Baseline Torque*
20 20 ± 5 in-lb
18 30 ± 5 in-lb
16 38 ± 7 in-lb
14 85 ± 15 in-lb