Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SK5505-3 found under Shaft Drive Flexible by Pennwalt Corp. The National Stock Number assigned to this part is 3040009577798, 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 SK5505-3.