I'm not sure the fan was actually a Flex-o-lite, it came from Pep Boys, 17" dia, 6 rigid aluminum blades and the center hole is 5/8" diameter. The spacer has to be there to keep the blades from hitting the damper pulley.
I don't like the fans with flexible SS blades, they always slice up my hands when trying to do any work near the front of the motor.
