Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 65 8405 4 found under Rib Airfoil by Boeing Aircraft. The National Stock Number assigned to this part is 1560015435521, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 65 8405 4.