Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W0-1SS found under Washer Flat by Honeywell Intl Inc. The National Stock Number assigned to this part is 5310008040141, 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 W0-1SS.