AMS 3667
Material specification for virgin, unfilled PTFE sheet. Confirm that the ordered filler stock has this product form and resin type.
Virgin Unfilled Molded PTFE Sheet
AMS3667E (stabilized 25 August 2011)
1 linked material grade
Material requirements.
Clearly organized.
Material specification for virgin, unfilled PTFE sheet. Confirm that the ordered filler stock has this product form and resin type.
Compression molded and sintered.
Molded sheet is the verified scope. Do not use this entry to certify skived tape, expanded PTFE, filled PTFE or modified PTFE without reviewing the actual material and applicable specification.
Stabilized publisher edition
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Open a material page or switch between chemical composition and mechanical properties.
Chemical & Mechanical Properties
Select a table to compare the source-labelled material data.
| Grade / identification | Material | Qualification |
|---|---|---|
| PTFE Polymer — UNS not applicable | Polytetrafluoroethylene | Virgin / unfilled for AMS 3667; check the required resin designation for IS 14635. |
Polymer identity and resin classification, not metallic elemental composition.
These published alloy values are comparison data. The AMS 3667 acceptance limits must be checked in the specified revision.
PTFE: resin type, processing route, product form and specimen preparation determine the required mechanical tests and limits.
Typical properties are comparison values. Manufacturer limits marked “min” apply only to the stated product. Confirm the ordered revision, thickness, heat treatment, specimen direction and gauge length before material acceptance.
Engineered for demanding service.
Grade selection depends on the process environment, temperature, corrosion exposure and equipment design.
From material specification to gasket construction
Select the required product form, grade, delivery condition and certification for the approved gasket construction. Finished gasket dimensions and performance requirements are established separately.
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Short answers for engineers and purchasing teams.
How should AMS 3667 be specified?
State the revision, exact material grade, product form, dimensions, delivery condition and certification requirements on the purchase order.
Are the displayed properties specification acceptance limits?
The tables identify published manufacturer reference data. Typical values describe the stated reference product and are not certified AMS 3667 limits. Use the ordered revision for material acceptance.
Are these all the materials covered by the standard?
This page links selected materials already present on the website. The linked material list is not the complete scope of the standard.
Which sources support this material reference?
SAE — AMS3667E virgin, unfilled molded PTFE sheet, stabilized 2011
BSI — BS 6564-2:1991 fabricated unfilled PTFE products, withdrawn 1998
BIS — IS 14635 (Part 1):2025 fluoropolymer designation system, current publisher record
BIS — IS 14635 (Part 1):2020 product manual (historical PTFE scope, not the 2025 acceptance tables)