[Antennas] Fasteners
Mike J Maloney
[email protected]
2002年6月25日 19:59:53 -0500
According to Marcia at Rohnnet.com, the 25JBK joint bolt kit for 20Gand
25G sections are 1ドル.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 2002年6月24日 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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