Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 44K 4 00020 004 found under Microcircuit Digita by G E C Marconi Avionics Ltd. The National Stock Number assigned to this part is 5962014458031, 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 44K 4 00020 004.