|
NO NOT FLAT!
Think of the surface area and the torque on that surface area against the flat back of your secondary cell. The bolt will attempt to drill into the back and it will burr the surface against which it bears! The best shape is a spherical one as the torque is applied tangentially and there is no lateral movement of the bearing surface. That's why all the lock knobs on all of the scopes I have made over the years were spherical and why all those commercially made ones I centre popped and epoxied a ball bearing to!
|