Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25-8864-509 found under Rib Flap Wing Landi by H And R Parts Co Inc. The National Stock Number assigned to this part is 1560016279053, 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 25-8864-509.