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SAE AMS3669 Revision G, February 1, 2012
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Polytetrafluoroethylene (PTFE) Sheet, Molded Premium Grade, As Sintered
Includes all amendments and changes through Stabilization Notice (No longer revised / updated) , February 2012
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AIA/NAS Aerospace Standards

This specification covers virgin, unfilled polytetrafluoroethylene (PTFE) in the form of sheet, manufactured by compression molding and sintering.


This sheet has been used typically for machined parts requiring chemical inertness up to 500 °F (260 °C), with better mechanical properties and/or electrical properties than AMS3667, but usage is not limited to such applications.


Sheet covered by this specification is classified as follows:

Type 1 For parts requiring chemical inertness and good mechanical and electrical properties up to 500 °F (260 °C). Testing of all specified properties is required.

Type 2 For parts requiring chemical inertness and good mechanical properties up to 500 °F (260 °C), where electrical insulation is not a consideration. Dielectric strength test (3.3.4) is not required.

Unless a specific type is ordered, Type 1 shall be supplied.

Safety - Hazardous Materials

While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.