This SAE Aerospace Standard (AS) specifies the dimensions, tolerances and size codes (dash numbers) for O-rings with a larger cross-section than those to AS568, for use in glands per MIL-G-5514 where squeeze at low temperature is often insufficient to provide a leak-tight seal.
SAE AS5798A-2019 history
2019SAE AS5798A-2019 Aerospace Size Standard for Oversize O-Rings
2013SAE AS5798-2013 Aerospace Size Standard for Oversize O-rings
2007SAE AS5798-2007 Aerospace Size Standard for Oversize O-rings