Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MT4-4378 found under Atr Low Profile by Emteq Inc. The National Stock Number assigned to this part is 5985016303180, and the Federal Supply Class is 5985 Antennas Waveguides And Related Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MT4-4378.