2a single mounting facility thread class 1.500" overall length 32 single mounting facility thread quantity per inch uns single mounting facility thread series
Used on nimitz class cvn, spruance class dd (963), los angeles class ssn (688), powhatan class t-atf 166, forrestal class cv, whidbey island class lsd, arleigh burke class ddg. 1.125" overall length 0.500" overall width
2b single mounting facility thread class 3.594" overall length 20 single mounting facility thread quantity per inch tap, circuit selector unc single mounting facility thread series