Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 657977 found under Microcircuit Linear by Raytheon Technical Services Company. The National Stock Number assigned to this part is 5962000112757, 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 657977.