This SAE Aerospace Standard (AS) establishes the requirements for fluid fittings that combine both37° flared and pipe threaded connections for use in all types of fluid systems.Fittings shall be furnished in the types and styles designated by the applicable AN, AS, MS, NAS,and other engineering standard drawings. This specification is the same as MIL-F-5509 asapplicable to 37° flared to pipe threaded fittings except for updated materials and processspecifications and industry coordinated general improvements. It is intended to serve as aprocurement specification for the fittings described herein and in Section 6.