Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EM518077 found under Pulley Groove by Electric Machinery Dresser Indus. The National Stock Number assigned to this part is 3020004287210, and the Federal Supply Class is 3020 Gear Pulley Sprocket And Transmission Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EM518077.