Sealing Tape, Sheet, or Gasket, Polytetrafluoroethylene, Expanded (EPTFE) Oil and Water Resistant
AMS3255
This specification establishes the requirements for an expanded polytetrafluoroethylene (EPTFE) in the form of sealing tape, gaskets, or sheets requiring no mixing or curing.
Rationale: AMS3255C incorporates the following changes: Deletes Class 3 as no manufacturer makes the product (Class is reserved for future use); moving Shelf Life verbiage to align with other specification locations and adds note that shelf life extension testing may be done by end-user, supplier, or test laboratory; referencing AS5127 for alternative fluid allowance for AMS3021 and add ref fluid (AMS3020) for MIL-PRF-83282; upgrade Type 1 to higher temp of Type 2 (differences in Type only density or WPA); added note that dimensions are for base material alone and adhesive backing will add to overall thickness; removed references to ‘die cutting’ as it is only one option for generating gasket shapes; adding recommended non-metal fastener P/N for corrosion testing. Other editorial changes made as necessary.
