Paul, We talked about this some time ago, I still like the idea.
Ti bolts with a belleville washer stack to prevent bolt stretch.
Bill Jepson

My data sources show titanium just as far from aluminum as carbon steel.
The austinetic stainless steels are closer, and are much less notch
sensitive.
The best bet is bellevilles and regular steel. I am doing a study on
bellevilles
for wood prop bolts, and they have a great deal of versatility.
Vance

I totally agree Vance. They work great on Breeze hose clamps as well.

Paul Lamar

Are Belleville washers available in stainless steel for 3/8'' propeller
bolts?

Yes.
McMaster Carr carries them in 17-7 PH SS in both English and metric sizes.

Paul Lamar
 
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