2b second mounting facility thread class right-hand second mounting facility 3.320" overall length 3.250" overall width 32 second mounting facility thread quantity per inch unc second mounting facility thread series
0.500" single threaded bushing thread length 4.250" overall length 14 single threaded bushing thread quantity per inch npt single threaded bushing thread series
Used on los angeles class ssn (688), spruance class dd (963), sturgeon class ssn (637), arleigh burke class ddg, ticonderoga class cg (47), kidd class ddg, forrestal class cv, nimitz class cvn, powhatan class t-atf 166, virginia class cgn (41).. weapon system essential
Used on ticonderoga class cg (47), forrestal class cv, sturgeon class dd (637), spruance class dd (963), virginia class cgn (41), kidd class ddg, los angeles class ssn (688), nimitz class cvn, powhatan class t-atf 166, arleigh burke class ddg.. weapon system essential