I don’t think the key material really matters.

The shaft is stainless, prop is Nibral, therefore you will always have dissimilar metals.

The key will be brass or stainless.

The taper is what truly holds the prop to shaft.

The key is simply back up.

Honestly I would opt for brass in case of prop strike. I would rather sheer the prop and key way versus sending that load into the V drive.


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