Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2348-10308-40 found under Nut Plain Hexagon by Sonatech Inc. The National Stock Number assigned to this part is 5310012517570, 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 2348-10308-40.