Thread pitch = threads per inch in the US system.
Roger Halstead (K8RI, EN73 & ARRL Life Member)
N833R, World's Oldest Debonair (S# CD-2)
> Hi Mel,
> The diameter of the head of both bolts is 9/16".
> I can't tell you the thread pitch since I am not familiar with that
> I am very skeptical of these bolts sold to me as "Rohn Hardware",
> but I wanted to inquire of those more knowledgeable than I.
> Tnx & 73
> Bob KQ2M
> Hi BOB:
> Thread pitch is the number of "threads per inch", usually stated as
> My R25G bolts all came with "fine" threads or SAE threads as some call
> The size of your bolt head, 9/16", makes me think these are 5/16" or even
> bolts. R25G uses 2 sizes per leg - so, I would have to guess that R45/55
> series would too...The 5/16" size is the only one common to both, but
> compare those threads. Most Home Depot/Lowes stores have a display with
> sizes mounted so you can match what you have... Fine thread, like 24
> galv bolts is rare to find in common home owner type stores...they usually
> only carry course threads. IF they are grade 5, there will be 3 little
> the head of the bolt" lines or ridges...kind of like a 3-blade airplane
> This is the universal sign for high strength steel bolts. IF you don't see
> those, don't use them.
> Regards, 73
> Mel Frost
> 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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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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