Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 240-1697530 found under Hose Air Duct by Bae Systems Technology Solutions And Services Inc Dba Bae Systems Information And. The National Stock Number assigned to this part is 4720002028975, 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 240-1697530.