Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WAS139 found under Washer Flat by Federal Div Of Victoreen Instrum. The National Stock Number assigned to this part is 5310002851530, 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 WAS139.