Belleville washer use for propeller installation

[142YX]

Jabiru recommends the use of 8 belleville washers for each prop bolt in their installation manual, but the part number they call out is for a 1/4" bolt, and believe that most people are using 3/8" bolts. My particular installation is a 3300 with a Prince propeller.

Are people using bellevilles? If so, how many and what part number?

[lutorm]

Mark Zeitlin has done some work to figure out what the different belleville washers are for different prop configurations. Check out http://www.cozybuilders.org/Prop_Bolt_Bellville_Washer/.