Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5338739-103 found under Washer Flat by Century Fasteners Corp. The National Stock Number assigned to this part is 5310012021636, 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 5338739-103.