[Antennas] Fasteners

Tue, 25 Jun 2002 19:59:53 -0500

According to Marcia at Rohnnet.com,  the 25JBK joint bolt kit for 20Gand
25G sections are $1.60 each and includes:

3-bolts 1/4-28 by 1-1/2" Grade 5, Zinc plated
3-bolts 5/16-24 by 1-1/2" Grade 5, Zinc plated
3-nuts 1/4-28 hex zinc plated
3-nuts 5/16-24 hex zinc plated

Much of their other fasteners are tagged "hot dipped galvanized", but the
above simply zinc plated, perhaps a cold process.   Dont know why they
use fine thread, unless that be typical for Grade 5 bolts?   The higher
price may be for the zinc coating of grade 5 bolts, perhaps not a common
practice?

Marcia can give you the nearest distributer, contact her at
[email protected]

73, Mike

On Mon, 24 Jun 2002 16:16:48 -0400 "A10382" <[email protected]> writes:
> There is no substitute for quality fasteners....
>     Get the SAME (SAME meaning IDENTICAL) ones speced by the tower
> manufacturer and DO NOT SKIMP....
>         Same grade
>         Same size
>         Same thread (and a lock nut if speced)
>         Same washer & lock washer and nuts as speced
>         Some manufacturers spec a torque setting for a reason
> Buying from the tower manufacturer directly may cost a bit more, but 
> may
> save you a lot of headaches in the future...  Almost every tower 
> will
> eventually need to come down.  It's easier to unscrew a bolt than 
> cut it
> with a torch!
> -------------------------
> Stainless steel:
>     IS NOT rust proof, just very rust resistant
>     Can very in strength and quality
>     Can gall - you may need to use some sort of anti-electrolysis
>         compound, especially if within 20 miles of salt water.
>     Is usually not as strong as similar grade carbon steel bolts
>     Imported bolts & nuts are frequently mis-labeled as to grade
>     Same is true of units of unknown origin
>     Lowes and Home Depot stress price!  Read what you will into that
> -------------------------
> 73
> Frank
> 
>  ._._.
> 
> - - - 
> 
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