Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 478843 found under Cap Filler Opening by Beta Engineering Inc. The National Stock Number assigned to this part is 2840000758494, and the Federal Supply Class is 2840 Gas Turbines And Jet Engines Aircraft Prime Moving And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 478843.