Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S25 8UN39 6 found under Shaft Assembly Flex by Hawker Beechcraft. The National Stock Number assigned to this part is 1680016424798, 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 S25 8UN39 6.