Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B856-5309 found under Shaft Assembly Flexible by Tyco Electronics Corporation. The National Stock Number assigned to this part is 3040004319337, 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 B856-5309.