Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number QQ-S-698 found under Spacer Ring by Federal Specifications. The National Stock Number assigned to this part is 5365005955225, 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 QQ-S-698.