Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B255668 found under Rib Ventral Fin by British Aerospace Inc. The National Stock Number assigned to this part is 1560996031409, 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 B255668.