Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 583 289 C1 found under Washer Flat by Navistar Intl Corp. The National Stock Number assigned to this part is 5310013343505, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 583 289 C1.