Elastomer: Tetrafluoroethylene/Propylene (FEPM) Hydraulic Fluid and Synthetic Oil Resistant 75 to 90 Hardness
This specification covers two classes (durometers) of tetrafluoroethylene/propylene rubber (FEPM) in the form of sheet, strip, tubing, extrusions, and molded shapes. For molded rings, compression seals, O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications, use the AMS7255 or AMS7256 specification, as appropriate.
This revision eliminates corrosion and weathering requirements, modifies periodic testing duration and removes “or equivalent” from hardness requirement. It also incorporates the format of the most current AMS3XXX template.