Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 04-000 ITEM 74 found under Washer Flat by Ward Leonard Electric Company Inc. The National Stock Number assigned to this part is 5310009826592, 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 04-000 ITEM 74.