Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B77T0197-1423 found under Microcircuit Memory by Mcdonnell Douglas. The National Stock Number assigned to this part is 5962004343072, 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 B77T0197-1423.