Fasco Fastener #8 x 1 1/2x22 Silicon Bronze Frearson Flat-Head Wood Screws, 100-Pack | for Boats DZR6_L2WOH45

Silicon Bronze - the generic term for various types of copper-silicon alloys. The properties of the alloy; a high percentage of copper, and small amounts of silicon, manganese or aluminum added for strength. Resists corrosion due to sea water, gases, sewage, and atmospheric conditions