Originally Posted by
706jim
It's been several years since I bought these prop nuts. At the time, all of mine were made from 7/8" hex bar stock, so the 7/8 wrench was the logical way to tighten them. If they are now completely round your best bet would be channel lock pliers with rag wrapped around the nut to prevent marring them.
Once again there is a reason why there is a hole through the prop nut, so that you don't have to use "channel lock pliers on them". He was probably just joking?