Brass Flex Ferrules: 3/16 shaft to 3/16 Cable : 7/16 OD

Brass Flex Ferrules: 3/16" shaft to 3/16" Cable 

Specs:
Outer diameter: 7/16" (11.1mm approx)
Length: 1.4" (35.5mm approx)

This is used when connecting a round 3/16" flex cable to a 3/16" propeller shaft. The cable can either be glued or soldered into the flex ferrule. You can read some info on the glue method here. The opposite end uses 2 grub screws to tighten the shaft to the flex ferrule.