Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AN310-5 found under Nut Plain Castellated Hexagon by Freundlich Supply Company Inc. The National Stock Number assigned to this part is 5310001671286, 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 AN310-5.