2a thread class right-hand 1.531" overall length 2.000" overall width 18 thread quantity per inch contact holes f, g, h, j, l, n, q, s, t, u, v plugged uns thread series
Used on air traffic control beacon interrogator 5 (atcbi5). 2a single mounting facility thread class 0.375" single mounting facility thread length 4.349" overall length 1.312" overall width circular wafer, bushing mount unef single mounting facility thread series