- 3 -
Bolt identification
Bolt 4T 7T 9T
diameter pitch (mm)
(Low carbon steel) (High carbon steel) (Alloy steel)
M 61.0 0.60.2 0.750.2
M 81.25 1.30.5 1.750.5 2.00.7
M101.25 2.80.7 3.750.9 5.01.3
M121.25 6.251.2 7.751.5 9.651.9
M141.5 8.751.9 11.852.3 14.502.9
M161.5 13.32.7 17.303.5 20.404.1
M181.5 19.23.8 24.905.0 29.305.9
M201.5 26.35.3 34.406.9 40.408.1
M221.5 33.08.3 46.259.2 54.1010.8
M242.0 45.89.2 58.2014.0 70.6014.1
*M101.5 2.70.7 3.70.9 4.91.2
*M121.5 5.81.2 7.21.4 9.11.8
*M142.0 9.11.8 11.22.2 13.62.2
*M162.0 12.72.5 16.53.3 19.53.9
Note : The marked (*) bolts which are made with the soft materials, e.g., cast-iron products
shall be used for a female screw part.
1.3. Torque Specifications
Standard Bolts
The below described torque value shall be applied for the general torque which are not
specially specified in this table.
(Unit : kgm)