[3d] Fix screw head mismatch between screwhole and nuttrap
[3d] Fix screw head mismatch between screwhole and nuttrap

The nuttrap() made a 6mm diameter 3.5mm deep hole and the screwhole()
only created a 3mm deep hole so the outer edge was angled internally for
0.5mm

CapnBry/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter