Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MF324 found under Stone Sharpening by Norton Co. The National Stock Number assigned to this part is 5345013236107, and the Federal Supply Class is 5345 Disks And Stones Abrasive. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MF324.