Used on aircraft, ac-130h, mc-130h, ec-130e, hc-130); tarawa class lha; helicopter, search and rescue, hh-60h; landing craft air cushion (lcac); aircraft, c-2a (reprocured); helicopter, uscg search and rescue, hh-60j; helicopter, carrier based asw, sh-60f; helicopter, mh-53e; helicopter, advance attack, ah-1w; ticonderoga class cg (47). 2a thread class 32 thread quantity per inch weapon system essential uns thread series
