Toro Z MASTER 2000 Series Service Manual page 19

SAE Grade 8 Steel Set Screws
Thread Size
1/4 - 20 UNC
5/16 - 18 UNC
1/2 - 13 UNC
3/8 - 16 UNC
Wheel Bolts and Lug Nuts
Thread Size
7/16 - 20 UNF Grade 5
1/2 - 20 UNF Grade 5
M12 X 1.25 Class 8.8
M12 X 1.5 Class 8.8
**For steel wheels and non-lubricated fasteners.
Thread Cutting Screws (Zinc Plated Steel)
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
*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.
Thread Cutting Screws (Zinc Plated Steel)
Threads Size
No. 6
No. 8
No. 10
No. 12
*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.
2000 Series Z MASTER® Service Manual
3438-778 Rev A
Type 1, Type 23, or Type F
Conversion Factors
in-lb X 11.2985 = N • cm
ft-lb X 1.3558 = N • m
N • cm X 0.08851 = in-lb
N • cm X 0.73776 = ft-lb
Threads per Inch
Type A
18
15
12
11
Recommended Torque
Square Head
140 ± 20 in-lb
215 ± 35 in-lb
75 ± 15 ft-lb
35 ± 10 ft-lb
Recommended Torque**
65 ± 10 ft-lb
80 ± 10 ft-lb
80 ± 10 ft-lb
80 ± 10 ft-lb
Type B
20
18
16
14
Page 2–9 Specifications and Maintenance: Torque Specifications
Hex Socket
73 ± 12 in-lb
145 ± 20 in-lb
50 ± 10 ft-lb
18 ± 3 ft-lb
88 ± 14 N • m
108 ± 14 N • m
108 ± 14 N •m
108 ± 14 N • m
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
Baseline Torque*
20 ± 5 in-lb
30 ± 5 in-lb
38 ± 7 in-lb
85 ± 15 in-lb