Historical
SAE AMS 7271H-1992 (SAE AMS7271H-1992)
Rings, Sealing, Butadiene-Acrylonitrile (NBR) Rubber Fuel and Low Temperature Resistant 60-70 ( Reaffirmed: Oct 2001 )
This specification covers a butadiene-acrylonitrile (NBR) rubber in the form of molded rings. These rings have been used typically for sealant at temperatures as low as -55 degrees C (-67 degrees F) where resistance to fuel is required, but usage is not limited to such applications. The cross-section of rings is usually not over 0.275 inch (6.98 mm) in diameter or thickness.
Society of Automotive Engineers [sae]