Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B285039 found under Rib Wing by Bae Systems Plc. The National Stock Number assigned to this part is 1560004527786, 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 B285039.