Canon Staple Finisher-AA1 Service Manual page 11

The recommended torque value is shown below as a reference value.
Fastened member Metal
Tightening M4 Approx.
torque 1.6
(N*m)
M3 Approx.
0.8
* For PCB, refer to the tightening torque value of resin (fastened member).
RS tight
Resin Metal
Approx. Approx.
1.6 1.6
Approx. Approx.
0.8 0.6
RS tight W Sems
Type of Screws
W Sems
Resin Metal
Approx. Approx.
0.8 1.6
Approx. Approx.
0.6 0.6
Type of Screws
Binding
3
Safety Precautions
Binding
Resin Metal
Approx. Approx.
0.8 1.6
Approx. Approx.
0.6 0.6
TP
TP
Resin
Approx.
0.8
Approx.
0.6