Use of stainless steel rivets in pitot mast mount

I was mistakenly sent 2.5mm dome stainless steel rivets CCP-32 instead of the ordered CCC-32 countersunk version, intended for all the nutplates in the pitot heat controller and camera power supply mounting plates. So I took the opportunity to use these instead of the aluminium rivets I only just installed. The stainless steel rivets are far stronger. Coated mating surfaces and rivets with Duralac yellow.