Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 042121008 found under Nut Plain Hexagon by L 3 Communications Elac Nautik Gmbh. The National Stock Number assigned to this part is 5310121543019, 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 042121008.