Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4N12157-103A found under Panel Assembly Cargo Compartment by Williams Aerospace And Manufacturing. The National Stock Number assigned to this part is 1560005089482, 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 4N12157-103A.