Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MRI-IRVIN-820-AND-821 found under by Airborn Inc. The National Stock Number assigned to this part is 5865012663840, and the Federal Supply Class is 5865 Electronic Countermeasures Counter-Countermeasures And Quick Reaction Capability Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MRI-IRVIN-820-AND-821.