Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 13E2520-4 found under Plate Identificatio by Fleet Readiness Center East Div Department Of Navy. The National Stock Number assigned to this part is 9905014707182, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 13E2520-4.