There's no room for lock washers on my Rohn 25 with 1-3/4" bolts that
are there. The bolt ends are flush with the tops of the nuts. Fine
thread probably doesn't need lock washers because of the spring of the
tube. There is a great deal of survival difference between hot dipped
galvanized and electro plated zinc. Same material but so much more for
hot dipped than for plated. There will be more corrosion next to the
stainless steel than next to the galvanized hardware, though these days
the stainless may be easier to acquire. Stainless may have a higher
strength, but what about impact strength? Grade 8 steel is stronger than
grade 5 still but is more prone to fracture from impact.
73, Jerry, K0CQ
--
Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.
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