A bronze screw having a tapered point and a coarse pitch thread length approximately two thirds the nominal length of the screw.
The Frearson Drive is similar to the Phillips Drive, but the Frearson Drive has a more pointed 75 degree V shape, minimizing cam out.
Silicon bronze is an alloy made of 95%-98% copper plus a small amount of silicon added for strength. Small amounts of manganese and aluminum may also be added for strength, and lead may be added for machineability. Silicon bronze is non-magnetic with a high degree of thermal and electrical conductivity and high corrosion resistance against sea water, gases, and sewage. Bronze wood screws are often used in marine applications.
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