Sae-as33514 |top| Jun 2026

For new aerospace designs, SAE-AS33514 is the recommended choice due to its proven reliability in flight hours (billions of fleet hours since the 1970s).

: Surface roughness must comply with ANSI/ASME B46.1 to prevent leaks at the sealing interface.

In simple terms, the standard provides the exact dimensional specifications for the end of a fitting designed to connect to a tube without the need for "flaring" (i.e., widening) the tube’s end. Instead, it creates a high-pressure, leak-tight seal using a sleeve (or ferrule) and a gasket. By defining these precise measurements, SAE AS33514 ensures that components from different manufacturers can be used interchangeably and will perform reliably in critical systems.

The current list price for SAE AS33514E is $105.00 USD. Prices may vary slightly by distributor. sae-as33514

Six months later, Flight 402 hit severe clear-air turbulence. The wing flexed violently, sending shockwaves through every hydraulic line. A lesser fitting might have cracked or wept fluid under the strain. But the AS33514 fitting held firm. Its 24° internal cone design, perfected over decades of revisions, maintained a hermetic seal even as the metal around it groaned.

SAE International revises AS33514 roughly every 5–7 years. The latest revision (as of 2025) is , which clarified torque values for titanium tubes and added requirements for laser-etched traceability.

Every circular cut must align perfectly with the middle axis of the fitting. Specification Details Connection Style Flareless Type Internal Cone Angle 24 Degrees Primary Material Choice High-grade Stainless Steel (like SS316L) Key Use Cases Hydraulic lines, high-temperature PTFE hoses For new aerospace designs, SAE-AS33514 is the recommended

In aerospace, a lost identification mark can lead to incorrect wire termination, maintenance errors, or even an in-flight malfunction. provides the engineering community with a clear, testable, and enforceable standard for wire identification sleeves.

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.

Published by the Society of Automotive Engineers, this standard replaces the military specification MS33514 and is widely used for aerospace fluid system components, such as fittings, hoses, and couplings. AS33514 is central to the design and quality control of these critical parts, ensuring the reliability of aircraft fluid systems. Instead, it creates a high-pressure, leak-tight seal using

Other SAE standards that work alongside AS33514 for tube and hose assembly include:

Disclaimer: This post is for informational purposes. Always consult the full SAE specification and your DER before changing design standards.

: Primarily focuses on 24-degree cone flareless fluid connections, often rated for systems up to 3000 psi .

SAE-AS33514 fitting ends are used in a wide variety of aircraft and defense systems, including: