Hi

Can this propeller

https://www.masterairscrew.com/products/...4pEALw_wcB

Fit this motor, maybe with an adaptor?

https://www.kdedirect.com/collections/ua...5215xf-330

It should fit, if you buy the adapter they recommend. The adapter said M8 shaft and the prop can fit over that M8 shaft.

Thank you. Is that the KDE adaptor? It looks like it's designed for something different. Is there another adaptor?

Yes the KDE adapter. They have RH and LH. Not sure what you are using the motor for. If for multi-rotor, then I suggest just getting the LH (CW thread) and buy nylon nuts.

https://www.kdedirect.com/collections/mu...f-pa620-lh

Thank you. I noticed this propeller has a pitch of ten, and the recommended propeller for that motor has a pitch of five point three. Will the propeller with the pitch of ten be compatible with the motor or will I need to run it at a lower speed or something?

I don't know the exact conversion between your biblade vs the maximum limited the manufacturer recommended for your motor. Which is 21.5 x 7.3 triblade.

Your prop you linked has a pitch of 8 not 10.

If you over prop, you can risk burning the motor or esc. Or you can be completely fine. Manufacturer has always recommended parameters and people have always test the limits. The risk you take.

Thank you. And what are the nylon nuts for?

Nylon Loc nut is the best things to prevent the nut from spinning loose.