Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SP2573 found under Ring by Freedman Seating Company. The National Stock Number assigned to this part is 5365006134353, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SP2573.