Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H990317-001B found under Microcircuit Digita by Raytheon Company. The National Stock Number assigned to this part is 5962011928768, 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 H990317-001B.