Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 15939-043-18 found under Shaft Assembly Flex by Safran Power Usa Llc. The National Stock Number assigned to this part is 1680003211170, 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 15939-043-18.