Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 53D030006-3 found under Washer Flat by Monogram Aerospace Fasteners Inc. The National Stock Number assigned to this part is 5310003953750, 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 53D030006-3.