"_" wrote in message
...
Application is a handle-bar clamp - could be left exposed to
seaside-winter
conditions for weeks/months.

Clamp is brass, screws are some stainless as sold to me by a fastener
company (don't know what variety of SS).

Will they gall?

I'd say the answer is a grease which provides good corrosion protection
rather than an anti-galling product. Ask your sailing friends.