GROMMET

The MS21266-4N is a genuine Textron Aviation grommet that seals a joint or opening against air, fluid, or contamination. It is applicable to the 1900 Airliner, Citation Excel, XLS, XLS+, XLS Gen 2, Citation III, VI or VII, Citation Sovereign or Sovereign+, King Air 350 Fusion, King Air 350C FM-36 & On, King Air 350C Fusion, King Air 350i, King Air 360, and King Air 360C, among other compatible variants. It carries an export classification of ECCN EAR99, weighs 0.02 lbs, and measures 12.65 (L) x 0.35 (W) x 0.3 (H) in. Supplied directly by Textron Aviation as an original-equipment (OEM) part, the MS21266-4N meets the manufacturer's specification and keeps the aircraft configuration-correct, with clean traceability in the maintenance records. Across the Beechcraft 1900, Cessna Citation, Beechcraft King Air, and Beechcraft Premier fleet, correctly identified factory parts like this keep every airframe consistent and configuration-correct. A seal or gasket keeps a joint tight against its service conditions; only the specified part reliably maintains that integrity. On a certificated airframe, part provenance matters as much as the part itself; genuine factory sourcing settles that question up front. These aircraft are built by Textron Aviation, which unites Cessna (founded 1927) and Beechcraft (founded 1932) under one Wichita, Kansas company since 2014. Derived from the King Air, the 19-passenger Beechcraft 1900 airliner (built 1982–2002) remains in service with regional and cargo operators. To check availability, request a quote for MS21266-4N or browse more Beechcraft 1900, Cessna Citation, Beechcraft King Air, and Beechcraft Premier parts on Flying411.