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These Silicon Bronze screws have cut threads and the full-bodied diameter shank desired by boatbuilders. Unlike rolled thread screws with their reduced shank--these screws have a shank diameter that is the same size as the outside of the threads. This completely fills the clearance hole normally drilled for the shank thus creating a waterproof seal. These wood screws have a square drive recess to help prevent cam out.
February 28, 2022
These are to replace the R&P (Frearson) screws in our mahogany boat build. Much easier to work for part fitting and removing during the build.
May 31, 2017
an old time quality product
May 14, 2013
It is great to have a source for square-drive silicon bronze screws. I drove a hundred of these with an impact driver in pre-drilled countersunk pilot holes on a boatbuilding project. No screws broke, although two had their heads split, requiring withdrawal. 98 out of 100 gets 5 stars.
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