Tightening Torques For General Use Screws, Bolts And Nuts - Kubota WSM OC60-E2 Workshop Manual

OC60-E2, OC95-E2, WSM
[2] TIGHTENING TORQUES FOR GENERAL USE SCREWS, BOLTS AND
NUTS
When the tightening torques are not specified, tighten the screws, bolts and nuts according to the table below.
Grade
Nominal
Diameter Unit
M6
M8
M10
M12
Screw and bolt material grades are shown by numbers punched on the screw and bolt heads. Prior to tightening,
be sure to check out the numbers as shown below.
Punched number
None or 4
7
Standard Screw and Bolt
7.9 to 9.3 0.80 to 0.95
17.7 to 20.6 1.8 to 2.1
39.2 to 45.1 4.0 to 4.6
62.8 to 72.6 6.4 to 7.4
Screw and bolt material grade
Standard screw and bolt SS41, S20C
Special screw and bolt S43C, S48C (Refined)
ft-lbs
5.8 to 6.9 9.8 to 11.3
13.0 to 15.2 23.5 to 27.5
28.9 to 33.3 48.1 to 55.9
46.3 to 53.5 77.5 to 90.2
S-11
Special Screw and Bolt
ft-lbs
1.00 to 1.15 7.23 to 8.32
2.4 to 2.8 17.4 to 20.3
4.9 to 5.7 35.4 to 41.2
7.9 to 9.2 57.1 to 66.5
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