Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 999400048003 found under Nut Slotted by Eaton Aerospace Ltd. The National Stock Number assigned to this part is 5310004691022, 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 999400048003.