Used on sonar set an/bqq-6. 2a thread class right-hand 1.581" overall length 2.719" overall width 16 thread quantity per inch 36-56 insert configuration un thread series
Used on 5805-01-187-9399 switchboard,telephone automatic. 2a thread class right-hand 1.328" overall length 28 thread quantity per inch unef thread series
2a thread class right-hand 1.662" overall length 1.469" overall width 18 thread quantity per inch item must comply with requirements of desc production standard no. L04158; for navy nuclear propulsion plant products only unef thread series