Understanding SAE-AS33514: A Comprehensive Guide to Aerospace Flareless Tube Fitting Ends
flared system governed by standards like AS4395 . Flared systems require a mechanical tool to expand the mouth of the tube. Conversely, SAE-AS33514 specifies a 24∘24 raised to the composed with power
involving these specific parts. Part numbers established under the original military specification remain unchanged to maintain compatibility. comparison table
: It typically mates with nipple subassemblies or fitting ends designed to SAE AS33514 standards : The standard is active (currently at revision
of the dimensions for specific tube sizes defined in this standard? sae-as33514
SAE-AS33514-compliant fittings are found in virtually every fixed-wing and rotary-wing aircraft with hydraulic systems, including:
MS33514 (Military Spec) ──> SAE-AS33514 (2007) ──> SAE-AS33514E (Current)
The origins of this engineering document track back to the Department of Defense (DoD) standardization initiatives.
As avionics density increases and aircraft move toward more electric architectures (MEA), wire identification becomes even more critical. The latest revisions of AS33514 (currently Rev. C as of this writing) are incorporating: As avionics density increases and aircraft move toward
The rigorous standards of SAE-AS33514 are critical for demanding, high-stakes environments where system failure is not an option.
Actual pressure ratings depend on tube material (typically 304 stainless steel, 321 stainless, or aluminum alloy 6061-T6) and tube wall thickness.
Since they do not require a flare (a 37-degree cone at the end of the tube), they are often easier to install in confined, hard-to-reach areas.
The standard undergoes an official five-year review loop to maintain alignment with modern aerospace metallurgy and tight manufacturing criteria. Because it was an AS33514-compliant part
connections. Instead of widening the end of the tube, these fittings often use a "bite-type" sleeve or a gasket seal to create a leak-proof joint. saemobilus.sae.org Weight Savings:
Key Technical Requirements
Elias ran his finger along the fitting's surface. Because it was an AS33514-compliant part, its surface roughness was controlled to a surgical degree to ensure the gasket seal would never fail under the temperature extremes of -65°F at 30,000 feet.