Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 998 6100 found under Washer Flat by A L D Inc. The National Stock Number assigned to this part is 5310013743817, 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 998 6100.