Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AT0F-3405-1 found under Washer Flat by Accutemp Products Inc. The National Stock Number assigned to this part is 5310016427623, 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 AT0F-3405-1.