Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ECN CS-81524 PC84 found under Nut Special by Huntington Ingalls Incorporated. The National Stock Number assigned to this part is 5310012763913, 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 ECN CS-81524 PC84.