Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number J98F0051-6 found under Washer Flat by Mcdonnell Douglas. The National Stock Number assigned to this part is 5310012715951, 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 J98F0051-6.