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The is the definitive aerospace specification governing bearing installation and retention by swaging or staking . Published by the Aerospace Industries Association (AIA) , this document establishes the precise technical requirements, inspection protocols, and testing methods necessary to secure spherical and plain bearings into aircraft structural housings. For manufacturing engineers, maintenance, repair, and overhaul (MRO) facilities, and quality inspectors, accessing the NAS0331 PDF ensures compliance with stringent safety and performance baselines required across commercial and military aviation. Core Engineering Scope of NAS0331

NAS0331 (National Aerospace Standard 0331) establishes critical industry requirements for the installation and retention of aerospace bearings using swaging and staking techniques, focusing on material compatibility and load capacity. The standard defines precise specifications for housing tolerances, no-load torque values, and inspection criteria to ensure structural integrity. For more details, visit Globalspec NAS0331 Bearing Specification Details | PDF - Scribd nas0331 pdf

A common point of confusion is the "NAS" prefix, which may lead to a search for "NAS0331 pdf" as a NASA document. However, NAS standards are created and published by the of America, not the National Aeronautics and Space Administration (NASA). In aerospace engineering, NAS standards define product specifications and uniform processes used across the entire industry. The official title of NAS0331 is "Bearing Installation and Retention by Swaging or Staking" . It ensures that the secure installation of critical components, such as bearings, is done reliably and consistently. However, NAS standards are created and published by

However, this is where a critical warning is necessary: AIA NAS0331 - Accuris Standards Store

NAS0331 addresses this by outlining how to displace the metal of either the bearing's V-groove or the housing itself to form a permanent mechanical lock. The standard applies to any structural housing material (such as aluminum, titanium, or steel alloys) and focuses predominantly on standard Military Specification (Mil-Spec) Corrosion Resistant Steel (CRES) race bearings. AIA NAS0331 - Accuris Standards Store