The primary function of the AS33514 standard is to provide a reliable, leak-proof connection for hydraulic and fluid lines without the need for flaring the tube ends. It features a design with an external thread.

: Pitch diameter and specific fitting diameters must be concentric within .008 to .005 full indicator movement (F.I.M.).

is an aerospace standard that specifies the design requirements and standard dimensions for a flareless tube connection and gasket seal fitting end. Originally derived from the United States Military Specification MS33514 , it serves as a critical blueprint for ensuring the mateability and performance of fluid system components in high-stress aerospace environments. Purpose and Technical Function

: The standard also defines dimensions for gasket seals to ensure airtight and fluid-tight integrity under varying pressures. Key Specifications

: Unlike flared fittings that require the tube end to be widened, flareless fittings use a sleeve or ferrule that bites into the outer diameter of the tube, creating a mechanical seal.

Engineers and manufacturers adhere to strict dimensional data and quality notes within the AS33514 standard to ensure part interchangeability: