Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MRZ-1004B found under by Teledyne Mec. The National Stock Number assigned to this part is 5865012390898, 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 MRZ-1004B.