Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DW1690 found under Spacer Ring by Rosebank Engineering. The National Stock Number assigned to this part is 5365011079293, 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 DW1690.