Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4F10003-437B found under Floor Aircraft by Cpi Aerostructures Inc. The National Stock Number assigned to this part is 1560000018407, 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 4F10003-437B.