Used on sturgeon class ssn (637), submarine (ssn) fire control sys, submarine acoustic sonar systems, submarine armament and fire control systems, sonar, an/bsy-1(v), los angeles class ssn (688). horizontal split display; weapon system essential
Used on c-135,c-5,c-141,f-15,e-3a,f117a support equipment,lgm-30. 2a thread class 40 thread quantity per inch weapon system essential uns thread series
2b thread class right-hand any acceptable overall length 20 thread quantity per inch anodize surface treated straight type w/strain relief unef thread series
2b thread class right-hand any acceptable overall length 18 thread quantity per inch anodize surface treated straight type w/strain relief uns thread series