WASHER

The MS21258C28 is a genuine Textron Aviation washer used to fasten, secure, or retain components during assembly of the airframe. It is fitted to the Citation CJ1 or CJ1+, Citation CJ2 or CJ2+, Citation CJ3, CJ3+, CJ3+ Gen 2, CJ3 Gen 3, Citation CJ4, CJ4 Gen 2, CJ4 Gen 3, Citation Excel, XLS, XLS+, XLS Gen 2, Citation M2, M2 Gen 2, M2 Gen 3, and Citation V, Ultra, Encore or Encore+. It carries an export classification of ECCN EAR99, weighs 0.06 lbs, and measures 2.25 (L) x 2.25 (W) x 0.13 (H) in. As an original-equipment (OEM) part supplied directly by Textron Aviation, the MS21258C28 is built to the aircraft maker's specification and cross-references the type design as documented in the maintenance data. Choosing the genuine part over an unapproved substitute preserves configuration control and simplifies inspection sign-offs. Across the Cessna Citation fleet, correctly identified factory parts like this keep every airframe consistent and configuration-correct. 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. Cessna traces to the company Clyde Cessna founded in Wichita, Kansas in 1927; Textron Inc. acquired it in 1992, and since 2014 it has anchored Textron Aviation alongside Beechcraft and Hawker. The Citation family is the best-selling line of business jets ever built, and more than 7,500 have been delivered worldwide. To check availability, request a quote for MS21258C28 or browse more Cessna Citation parts on Flying411.