Historical
SAE AMS 7271J-2010 (SAE AMS7271J-2010)
Rings, Sealing, Butadiene-Acrylonitrile (NBR) Rubber Fuel and Low Temperature Resistant 60-70
This specification covers a butadiene-acrylonitrile (NBR) rubber in the form of molded rings. These rings have been used typically for sealing at temperatures as low as -67 \mDF (-55 \mDC) 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]