Standard:

• AMS3657
• Revision: C

Reaffirmed:

• 1998-11-01

Revised:

• 1993-07-01

Revision:

• Historical. Access the latest revision: AMS3657F

Issuing:

• Ams P Polymeric Materials Committee

Scope:

This specification covers one grade of polytetrafluoroethylene in the form of extruded and sintered rods, tubes, and shapes. These products have been used typically for parts, such as seals, back-up rings, bearings, bushings and insulators, requiring chemical inertness up to 260 degrees C (500 degrees F) and better mechanical and/or electrical properties than AMS 3656, but usage is not limited to such applications. When dimensional stability is required, it is recommended that stress relieved product in accordance with AMS 3659 be specified.

History:

Standard	Published	Revision	Status
AMS3657F	2011-08-25	Latest	Stabilized
AMS3657E	2010-05-17	Historical	Revised
AMS3657D	2008-03-17	Historical	Revised
AMS3657C	1993-07-01	Historical	Reaffirmed
AMS3657B	1991-10-01	Historical	Reaffirmed
AMS3657A	1976-07-01	Historical	Revised
AMS3657	1966-03-01	Historical	Issued

AKA:

• SAE AMS 3657

Sector:

• Aerospace

Topic:

• Fabrics
• Polymers
• Plastics
• Materials properties
• Textiles