Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MD320.256-70E found under Display Optoelectro by Watkins Johnson Intl. The National Stock Number assigned to this part is 5980013455868, and the Federal Supply Class is 5980 Optoelectrical Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MD320.256-70E.