Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ST9M481-8-3 found under Sprocket Wheel by Monogram Aerospace Fasteners Inc. The National Stock Number assigned to this part is 3020010460009, 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 ST9M481-8-3.