Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 743870-2 found under Shaft Assembly Flex by Alliant Techsystems Operations Llc. The National Stock Number assigned to this part is 3040007688232, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 743870-2.