Rivets: Aluminum or Stainless?

[Brion Toss]

Hi again,
And wow, I never saw it done that way. The method we use is to drill two sets of parallel holes in the mast, one set for a bent piece of steel, to hold the conduit in place, the other for the rivet hole for the conduit. It's twice as many holes, but might be net faster, and less fussy than the one-line method. After the conduit is done, you fill the hook holes with rivets. Take a look at almost any mast, and you will see the two rows of rivets where the conduit goes.
Fair leads,
Brion Toss