Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D63-2002-680 found under Gear Assy by Landers Frary And Clark. The National Stock Number assigned to this part is 3020005087633, 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 D63-2002-680.