RETAINER

The 45003-5 is a genuine Textron Aviation retainer used to fasten, secure, or retain components during assembly of the airframe. It fits the Beechjet 400/400A. It carries an export classification of ECCN 9A991, weighs 0.52 pounds, and measures 4.4 (L) x 4.4 (W) x 0.55 (H) Inches. As an original-equipment (OEM) part supplied directly by Textron Aviation, the 45003-5 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. Because the Beechcraft 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. Traceable OEM hardware keeps an aircraft's maintenance records defensible at annual, pre-purchase, and pre-buy inspections. 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. Fitting the correct factory part the first time avoids the rework, removal, and re-inspection that an incorrect or unapproved part can trigger. Beechcraft, founded in Wichita, Kansas in 1932, joined Cessna and Hawker under Textron Aviation in 2014, which today supports the worldwide Beechcraft fleet with genuine factory parts. 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. Request a quote for 45003-5, or browse more Beechcraft parts on Flying411.