Doosan DP222LBF - Tightening Torque of Plug Screw; Hollow Screw (4-Hole) Tightening Torque

5. About the engine
75
2. Tightening Torque of Key General Bolts
Tightening torque of plug screw
Hollow Screw (4-Hole) Tightening Torque
Nominal Diameter x
Pitch (mm)
Strength Classification
Remarks
8.8T 10.9T 12.9T
Tightening Torque (kgf·m) ± 10%
M6 x 1 1 1.25 1.5
M8 x 1.25 2.2 3.1 3.8
M8 x 1 2.4 3.35 4.1
M10 x 1.5 4.4 6.2 7.4
M10 x 1.0 5 7 8.4
M12 x 1.75 7.5 10.5 12.5
M12 x 1.5 8 11.2 13.4
M14 x 1.5 13 18.5 22
M10 M12 M14 M16 M18 M22 M24 M26 M30
5.0 5.0 8.0 8.0 10.0 10.0 12.0 12.0 15.0
Material
Classifi-
cation
M8 M10 M12 M14 M16 M18 M22 M26 M30 M38
SM25C - 1.6 2.5 3.5 4.5 5.5 9.0 13.0 18.0 30.0
SUM22L
a
a. Applied to Doosan Engines
0.81.83.04.05.56.511.0 16.0 20.0 35.0
STS304 0.8 1.8 3.0 4.0 5.5 6.5 11.0 16.0 20.0 35.0