Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AS103 found under Pulley by U S Dept Of Transportation Federal. The National Stock Number assigned to this part is 3020013563409, 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 AS103.