Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A-A-55485 4 found under Mounting Pad Electrical Electron by Federal Commercial Item Description. The National Stock Number assigned to this part is 5999010265319, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A-A-55485 4.