Browse Standards AMS7257A
Historical Reaffirmed 2011-08-15

Rings, Sealing, Perfluorocarbon (Ffkm) Rubber High Temperature Fluid Resistant 70-80 AMS7257A

This specification covers a perfluorocarbon (FFKM) rubber in the form of molded o-rings. These sealing rings have been used typically in applications in contact with air or a variety of fuels, lubricants and hydraulic fluids from -15 to +290 degrees C (+5 to 554 degrees F), but usage is not limited to such applications. Each application, however, has to be considered individually. Instances are known when these rings have been used below -15 degrees C (+5 degrees F) and above 290 degrees C (554 degrees F). The cross section of such rings is usually not over 0.275 inch (6.98 mm) in diameter or thickness.
AMS7257E
2014-09-05
Latest
Revised
AMS7257D
2012-11-20
Historical
Revised
AMS7257A
2011-08-15
Historical
Reaffirmed
AMS7257C
1998-08-01
Historical
Reaffirmed
AMS7257B
1992-01-01
Historical
Revised
AMS7257
1985-04-01
Historical
Issued

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