WASHER

The MS21258C24 is a genuine Textron Aviation washer — a fastening or retaining hardware item used in the airframe. It is fitted to the 1900 Airliner, 1900C Airliner, 1900D Airliner, Citation Latitude, Citation Longitude, Citation Sovereign or Sovereign+, Citation X, Citation X+, King Air 100, and King Air 350 Fusion, among other compatible variants. It carries an export classification of ECCN EAR99, weighs 0.03 lbs, and measures 1.8 (L) x 1.8 (W) x 0.15 (H) in. Because the MS21258C24 is an original-equipment (OEM) part sourced directly from Textron Aviation, it matches the exact specification and placement called out in the aircraft's type design and maintenance data — assurance a generic substitute cannot offer. Because the Beechcraft 1900, Cessna Citation, and Beechcraft King Air aircraft share extensive structure and hardware, a single part like this is often common across several variants. Fastening and retaining hardware may look simple, but grade, size, and finish are specified for the joint each secures — the correct part matters. Using the factory part number preserves configuration control, so the airframe stays consistent with its approved type design and the work is straightforward to sign off at inspection. Both the Cessna and Beechcraft lines are supported today by Textron Aviation, formed in 2014 to unite the two historic Wichita manufacturers with Hawker. The Beechcraft 1900, a 19-passenger regional airliner derived from the King Air, was produced from 1982 to 2002 and still serves commuter and cargo operators worldwide. Request a quote for MS21258C24, or browse more Beechcraft 1900, Cessna Citation, and Beechcraft King Air parts on Flying411.