Fasco Fastener 10-24 x 2 1/2x22 Silicon Bronze Phillips Flat-Head Machine Screws, | for Boats GPI2_H7FEX86

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