Description
The MS21266-5T is a genuine Textron Aviation grommet plastic edging used to keep a joint or pass-through tight. It is fitted to the Beechjet 400/400A. It carries an export classification of ECCN EAR99.
Because the MS21266-5T 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 aircraft share extensive structure and hardware, a single part like this is often common across several variants.
Sealing components are sized and compounded for the fluids, temperatures, and pressures they contain, so the exact specified part maintains a tight joint. Genuine sourcing means the part matches the drawing exactly, so fit and function are known quantities rather than a gamble at installation.
The value of an OEM part is as much in its paperwork and pedigree as its metal — both of which an aircraft's records require. OEM parts arrive to the specification the type design was certified against, preserving both airworthiness and the airframe's documented configuration.
Built by Beechcraft — the Wichita, Kansas manufacturer founded in 1932 and part of Textron Aviation since 2014 — this part carries a name long associated with rugged, capable aircraft. The Beechjet 400, which began life as the Mitsubishi Diamond and later became the Hawker 400, is a light business jet supported today through Textron Aviation.
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