In article , news.ind.net.spamtrap1
@yunx.com says...
Can you try galvanized? the zinc acts as a passable lubricant.

The plate is nickel plated. The screws are hex head hardened grade 5 or 8 I
think... Black oxide, right? anyhow... Strength is needed and I don't
think they make glavanized or nickel coated hex heads in those grades.


I thought these were hex socket flat heads? In inch sizes the standard
alloy hex socket cap screws are a bit stronger than grade 8s. Zinc
plated alloy hex socket flat heads are easily available.

Ned Simmons