Hartzell BA prop question

[JDanno]

I'm trying to find out the flange thickness and mounting bolt (stud) diameter of a Hartzell 3 blade BA prop. Anybody help me?? TIA, Dan

 

[C-GRVT]

The blended airfoil Hartzell that I got from Van's has an "R" type hub - prop model number HC-C2YR-1BFP/F7497-2.
This hub has six 1/2" studs (bolts). The flange thickness at the stud locations looks to be between 17 and 18/32".
Bill Brooks
Ottawa Canada
RV-6A finishing

 

[rdickens]

The stud diameter is 1/2", the bolt circle is 4.750" and flange thickness is .562 +/- .010".

Rolf Dickens
Hartzell

 

[JDanno]

Thanks guys!!