Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 980-0000-099 found under Washer Lock by Itt Corporation. The National Stock Number assigned to this part is 5310007225621, 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 980-0000-099.