Printrbot Simple Metal Fan Cover & Hose Clamp

I designed a fan cover for "safety" purposes and thought I'd integrate a hose clamp in order to route wiring as well as reduce flex near the extruder motor. The clamp will form a second secure point other than the zip-tie beneath the extruder motor.

Fan size: 40x40mm
Clamp inner diameter: 10mm
Cover only: http://www.thingiverse.com/thing:879894

The fan cover uses the existing screws and the thread is just long enough to exit the hex nut. This is the case when using 50an6xy06r6n's fan