Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 598AOPT5804 5809 5810 found under Counter Electronic Digital Reado by Phase Matrixinc. The National Stock Number assigned to this part is 6625015342510, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 598AOPT5804 5809 5810.