Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number STD 2013 found under Nut Plain Slotted Hexagon by Textron Lycoming Inc. The National Stock Number assigned to this part is 5310013336889, 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 STD 2013.