Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BACD40A04-088-4A12 found under Hose Air Duct by Boeing Aircraft. The National Stock Number assigned to this part is 4720014805368, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BACD40A04-088-4A12.