Toro Z MASTER 2000 Series Service Manual page 18

Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Metric Series)
Thread Size Class 8.8 Bolts, Screws, Studs with Regular
M5 X 0.8
M6 X 1.0
M8 X 1.25
M10 X 1.5
M12 X 1.75
M16 X 2.0
M20 X 2.5
Note: Reduce torque values listed in the table above by 25% for lubricated fasteners. Lubricated
fasteners are defined as threads coated with a lubricant such as oil, graphite, or thread sealant such
as Loctite.
Torque values may have to be reduced when installing fasteners into threaded aluminum or brass. The
specific torque value should be determined based on the fastener size, the aluminum or base material
strength, length of thread engagement, etc.
The nominal torque values listed above are based on 75% of the minimum proof load specified in SAE
J1199. The tolerance is approximately ± 10% of the nominal torque value. Thin height nuts include jam
nuts.
Specifications and Maintenance: Torque Specifications
Height Nuts (Class 8 or Stronger Nuts)
in-lb
57 ± 6
96 ± 10
ft-lb
19 ± 2
38 ± 4
66 ± 7
166 ± 17
325 ± 33
Class 10.9 Bolts, Screws, Studs with Regular
Height Nuts (Class 10 or stronger Nuts)
N • cm
644 ± 68
1085 ± 113 133 ± 14
N • m
26 ± 3
52 ± 5
90 ± 10 93 ± 10
255 ± 23 229 ± 23
440 ± 45 450 ± 46
Page 2–8
in-lb N • cm
78 ± 8 881 ± 90
1503 ± 158
ft-lb N • m
28 ± 3 38 ± 4
54 ± 6 73 ± 8
126 ± 14
310 ± 31
610 ± 62
2000 Series Z MASTER® Service Manual
3438-778 Rev A