FORD WSS-M21P37-A1

Description / Abstract: FORD WSS-M21P37-A1, 2019 Edition, March 20, 2019 - FASTENER FINISH S439, ZINC-RICH INORGANIC BASECOAT, LUBRICATED ALUMINUM-RICH ORGANIC TOPCOAT, SILVER ***TO BE USED WITH FORD WSS-M99P1111-A***

The material defined by this specification is corrosion protective coating for steel. It consists of a zinc phosphate pre-treatment or an alkaline clean and mechanical (shot blast) pre-treatment followed by a zinc-rich basecoat and an integrally lubricated aluminum-rich topcoat. The topcoat provides enhanced corrosion protection, and consistent torque-tension control.