Description
The MS21141U0504 is a genuine Textron Aviation fastener used to fasten, secure, or retain components during assembly of the airframe. It carries an export classification of ECCN 9A991.
Aircraft hardware is called out to a specific specification for each location; an off-the-shelf equivalent is rarely acceptable. 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.
Because a single part number can be superseded or vary by effectivity, confirm applicability against your aircraft's Illustrated Parts Catalog (IPC) and serial-number effectivity before ordering. The factory part is built to the manufacturer's material and dimensional specification, so it installs as designed without the surprises a generic equivalent can bring.
Confirm this part's applicability to your specific aircraft, serial number, and modification status against the approved parts data before you install it. Sourcing the OEM part protects the airframe's configuration and keeps its service history consistent, which matters for both airworthiness and resale value.
An unapproved or surplus substitute can introduce fit, material, or paperwork problems that surface at the next inspection; the genuine part avoids that risk.
Textron Aviation carries forward the legacies of Cessna and Beechcraft — two Wichita, Kansas firms whose aircraft have defined general aviation for the better part of a century.
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