According to my Rohn catalog the bolts are as follows:
1/4 X 1 1/2" NF grade 5
5/16 X 1 1/2" NF grade 5
I used stainless on my tower but could not find NF bolts
locally. I used NC with nylon locknuts. It's been up many
years now with no problems.
73, Roger
BTW NF = national fine
NC = national coarse ( 1/4-20 and 5/16-18)
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See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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