Steve wrote:

When I go to Rat Shack's website, the only standoff insulators I find
are for attaching to masts or screwing into wood. What if you need to
attach standoff insulators to concrete or masonry? Anyone have any
suggestions? I'd like to find some....preferably some that don't do a
lot of damage to the surfaces they attach to.

Maybe check Mouser.com and see what they have?

dxAce
Michigan
USA