Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E-7818-248-13 found under Muffler Exhaust Aircraft Ground by Industrial Acoustics Company Inc. The National Stock Number assigned to this part is 4920010631115, 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 E-7818-248-13.