pre alpha shaft size,1980s,what size prop nut.

cpt ron jc

Petty Officer 2nd Class
Joined
Aug 25, 2010
Messages
116
what size prop nut is used on a 1980s pre alpha lower,i went from a 1990 lower drive to a older pre alpha drive the prop nut is to small i think im looking for a 7/8 i can not locate one.
 
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