I used a belt sander to reduce the diamter around the 5/16" 12-point star Torque Adapter Wrench for Use on the Agilent TwisTorr 74 Turbo Pump since the turbo pump comes quite close to the screws, preventing the wrench from easily fitting around them.

The screw diamter is ~0.462-0.468". I ground down some of the wrench so that its radius was smaller than screw's. I confirmed the fit of the wrench around the screw that doesn't hit the pump.