Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 586R666H03 found under Pulley Flat by A S C Corporation. The National Stock Number assigned to this part is 3020014286406, 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 586R666H03.