Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4406991 found under Microcircuit Digital by N H Researchincorporated. The National Stock Number assigned to this part is 5962015678617, 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 4406991.