Octura Coupler Flex Hex 8mm threaded to .250 flex cable for for Nitro Engine

Octura 8mm threaded to .250 Flex (.250", 6.35mm) cable, for nitro engine.

Note: This coupler is for a nitro engine! Will not work with an electric motor! Fits 67-91 motors With a 8mm Crank Thread.  Picco,CMB HR Series. This Has No Pilot So Crank Threads Should Extend Past The Face Of The flywheel at least 6mm. Please check with engine manufacturer or measure before purchase