Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5001-3EX found under Washer Lock by Blowers Llc. The National Stock Number assigned to this part is 5310016622156, 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 5001-3EX.