Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 61A-039553 002 found under Nut Drive by Rotork Controls Ltd. The National Stock Number assigned to this part is 3020016445521, 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 61A-039553 002.