Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 42631 found under Microcircuit Memory by Raytheon Company. The National Stock Number assigned to this part is 5962012366685, 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 42631.