This Adapter is Designed Specifically for the YS-175, YS-185. These new motors do not have a shaft Long enough for the Thicker Props.
This Double Jam Nut Kit #TT-0813-A includes the larger 1-1/4' Dia. Prop Washer for the Big Props.
This Adapter will work well on other ?Short Shaft? applications requiring the 8x1.0mm Threaded Shaft.
Always Check for Thread interference and bottoming out of the Prop Nut or Jam Nut. If it does not look right, it probably is not correct for your application.
NOTE: "You" must ream out the front face of your prop for the prop nut if necessary.
8x1.0mm SHORT SHAFT DOUBLE JAM NUT Adapter Kit.