Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SSIN204-561 found under Motor Alternating Current by Singer Co The. The National Stock Number assigned to this part is 6105002366763, and the Federal Supply Class is 6105 Motors Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SSIN204-561.