Used on air traffic control beacon interrogator 4 (atcbi4). 2a single mounting facility thread class 0.375" single mounting facility thread length 3.000" overall length 1.906" overall width circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 2.375" overall length circular wafer, bushing mount unef single mounting facility thread series