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Old 09-13-2004
boatbum boatbum is offline
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Thru Hull Replacement

I just added a new thru hull for a salt rinse on the anchor pulpit. Mine was a bit thicker but not to matter. Use a bigger area 3/4" Teak or if you must Epoxied Plywood backing plate to spread the load. I think you will be fine with the countersink, just remove only as much as you need to flush it. At 1/4", still the head of the machine screw is flush with the hull and compressed in the countersink, and that load distributed over the back plate so I can''t see it pulling through or failing.
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