Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SP487 found under Clutch Positive Nonvehicular by Machine Components Corp. The National Stock Number assigned to this part is 3010010083703, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SP487.