Description
The MS21140U0604 is a genuine Textron Aviation fastener used to fasten, secure, or retain components during assembly of the airframe.
Aircraft hardware is called out to a specific specification for each location; an off-the-shelf equivalent is rarely acceptable. For a regulated aircraft component, correct identification by factory part number is what guarantees the exact form, fit, and function the design calls for.
Check effectivity and supersession status for your serial number so you order the currently applicable part. Fitting the correct factory part the first time avoids the rework, removal, and re-inspection that an incorrect or unapproved part can trigger.
Because interchangeability rules can apply, confirm the exact applicable part for your configuration in the IPC before installation. Because aircraft parts are governed by strict airworthiness and traceability rules, fitting the OEM part rather than an unapproved equivalent keeps the installation eligible and the aircraft's records clean.
Traceable OEM hardware keeps an aircraft's maintenance records defensible at annual, pre-purchase, and pre-buy inspections. OEM parts arrive to the specification the type design was certified against, preserving both airworthiness and the airframe's documented configuration.
Textron Aviation traces its roots to Cessna, founded in Wichita, Kansas in 1927, and Beechcraft, founded there in 1932 — two of general aviation's most storied names, united under one company since 2014.
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