REFLECTOR: Prop Bolt Nuts

[Brian Michalk]

I have some corrosion on the prop nuts, and want to replace them.  
Looking at the 12-20 nuts at Spruce, I can pay up to $5 or more for a nut.
I was considering the all metal stop nuts rather than the nylon ones.

What is the thought on this?  I'm using an IVO prop.

Also, should I replace the nuts on the prop flange too?  On the IVO, 
there are actually 12 bolts.  Well, actually six cap screws and six bolts.