Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HE1581-0-L-000 found under Microcircuit Hybrid by Raytheon Company. The National Stock Number assigned to this part is 5962014459570, 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 HE1581-0-L-000.