Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S8157N158-020 found under Spacer Ring by Honeywell Aerospace. The National Stock Number assigned to this part is 5365003404830, 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 S8157N158-020.