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M00011265
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FORD WSS-M21P51-A1 2019 Edition, March 22, 2019 FASTENER FINISH S450U, ELECTROPLATED ZINC-NICKEL, TRIVALENT CHROMIUM PASSIVATE, SILVER, ***TO BE USED WITH FORD WSS-M99P1111-A***
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FORD WSS-M21P51-A1, 2019 Edition, March 22, 2019 - FASTENER FINISH S450U, ELECTROPLATED ZINC-NICKEL, TRIVALENT CHROMIUM PASSIVATE, SILVER, ***TO BE USED WITH FORD WSS-M99P1111-A***
The materials defined by these specifications are corrosion protective coatings over steel and iron substrates. All consist of an alkaline zinc nickel alloy and trivalent chromium passivate. A2, A3, A4, A5 and A6 are also coated with a clear sealer to increase corrosion resistance and/or to provide consistent torquetension control.