Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 000173AA-28 found under Bfr Blk by Systems Management American Corp. The National Stock Number assigned to this part is 7010012019871, and the Federal Supply Class is 7010 Adpe System Configuration. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 000173AA-28.