Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B21322HS551 found under Shaft Travel Clutch by Ohio Industries Inc. The National Stock Number assigned to this part is 3040009830597, 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 B21322HS551.