Used on los angeles class ssn (688); sturgeon class ssn (637); submarine acoustic sonar systems; helicopter, searcjh and rescue, hh-60h; general purpose electronic test equipment gpete; fire control system, mk 92 (fcs); helicopter, uscg search and rescue, hh-60j; oliver perry class ffg; helicopter, carrier based asw, sh-60f. 2a thread class 0.812" overall length weapon system essential
