Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5 31775 14 found under Hose Air Duct by Boeing Aircraft. The National Stock Number assigned to this part is 4720005283391, 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 5 31775 14.