Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 13965-503 found under Parts Kit Damper by Houdaille Industries Inc. The National Stock Number assigned to this part is 1680003217153, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 13965-503.