<p>This SAE Aerospace Standard (AS) establishes the requirements for 37 degree flared tube fittings or machined internal cone fluid connection fittings for use with 37 degree external cone, spherical nose, and seal ring fittings in all types of aerospace fluid systems (see Section 6).</p>
Rationale: CRES hardness requirements updated to concur with equivalent CRES material requirements in similar flareless fittings proc spec per AS18280.