FPV SMA Connector Thumb Wheel

thingiverse

This printed part fits the 8mm SMA connector nut used on FPV gear. It slips over the nut portion making it easy to tighten/loosen the nuts without a wrench. I print one for each SMA connector and leave it in place. Using PLA the weight is just .25 gm. There is a small and large version. The large has an outside diameter 1.5 mm larger then the small. I use the small for tight places such as a 45° or 90° fitting. I use the large where there is plenty of room to grasp and turn. You can get the nut slightly tighter with the large version. Both versions have a .5mm slit to provide a little spring. This allows it to slide easily over the nut and allows for expansion and contraction from summer heat to winter cold.