Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R283-78072727566 found under Belt Abrasive by Saint Gobain Abrasives Inc. The National Stock Number assigned to this part is 5345012586658, 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 R283-78072727566.