Used on close in weapons system (ciws-phalanx);ticonderoga class cg(47);aircraft,b-2 bomber(atb);nimitz class cvn;gun,5-in/54 cal,mk-42 & 45;helicopter,mh-53e;spruance class dd(963);forrestal class cv;virginia class cgn(41);kidd class ddg. 2.095" center hole diameter
