Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EC600-4 found under Screw Assembly Pane by Aero Stat Co. The National Stock Number assigned to this part is 5305013050731, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EC600-4.