Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4438B found under Microcircuit Digita by Oai Electronicsllc. The National Stock Number assigned to this part is 5962012794984, and the Federal Supply Class is 5962 Microcircuits Electronic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4438B.