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Sunday, October 3, 2004, 2:59:15 PM, Slybarman wrote:
S> OK - This weekend I set about the task or re-bedding some of my deck
S> hardware on the aft sundeck. The deck is fiberglass that is cored with
S> plywood. These are primarily stanchions that hold the handrail and sundeck
S> surround. Thanks to the manufacturer's shortsightedness, thru-bolting was
S> not an option. When I started to remove the existing hardware, I noticed
S> that 1/2 of it was machine screws and 1/2 was wood screws. I believe the
S> machine screws were original. I have over-drilled the original holes and
S> re-filled them with thickened west system epoxy and I will drill pilot holes
S> and re-set the hardware with 3m 4200. My question is, do I use the machine
S> screws or the wood screws. The machine screws seem to have more threads per
S> inch. The wood screws seem to have deeper threads. I believe the machine
S> screws need to be "tapped" as well in order to install them. Any thoughts?
I expect that the machine screws orginally screwed into tapped metal plates or into nuts embedded in the glass - you've probably removed the threads with your drilling, and the fine threads of the machine screws won't hold well in epoxy.
You will have to use self-stripping - sorry, self-tapping sheet metal screws, or find some way to get to the underside to place nuts or a tapped metal plate to hold the machine screws.
--
Peter Bennett, VE7CEI Vancouver, B.C., Canada
Lien Hwa 28 (AKA Polaris 30) "Sea Spray"
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca
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