Used on f-15 aircraft. 2a thread class right-hand 1.915" overall length 1.125" overall width 20 thread quantity per inch socket contacts are removeable but filter contacts are not unef thread series
2b thread class right-hand 1.750" overall length 18 thread quantity per inch nickel surface treated double clamping action open frame type unef thread series
Used on combat control acoustic an/bsy-1. 2a single mounting facility thread class 0.437" single mounting facility thread length 2.123" overall length tap, circular, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.250" single mounting facility thread length 1.292" overall length snap or line unf single mounting facility thread series