Where is Ground [RE-wrenches]

[Dean T. Newberry]

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Hi Richard, I didn't reasearch it at all, just shooting from the hip to 
get a cost. Initial conversation is that they will be about $5000 for 
50,000 screws, I guess that is about ten cents apiece, I'll call my rep 
tomorrow and ask her to change the spec to 32 tpi.
Thanks for the heads up.
I am working on a plan for some Unistrut type racking with tooling on 
the top to "bite" into the module frame and provide grounding through 
the rack. I think Tile trak has that feature. I'll be testing over the 
summer and will keep you posted.
cul  deant

Richard L Ratico wrote:

>Hi Dean,
>
>Is there a particular reason you chose a 24 thread per inch screw rather than
>32? Standard green grounding screws are 32 tpi, as are electrical device screws 
>(receptacles, switches), and box screws.
>
>I wonder if the finer 32 thread offers a superior mechanical and electrical
>bond, particularly in thin metals like module frames.
>
>Thanks for taking the initiative here.
>
>Best.
>Dick Ratico
>Solarwind Electric
>P.O. Box 402
>Bradford, VT 05033
>802-222-9028
>
>Dean T. Newberry wrote:
>
>Hi yAll,
>I have requested Rainbow Fasteners to request a screw manufacturer to 
>fabricate a standard pattern, 12-24 flange head self drilling screw in 
>404 stainless for our use. I have placed an initial order for 50k units, 
>I expect to hear back the first week of june the willingness of the 
>manufacturer to produce the order. The noncompliant screw, 12-16 flange 
>head self driller I am using now costs $5.15/lb I expect the 12-24 
>pattern to be a similar price.
>cul  deant at dcn.org
> 
>
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