2a single mounting facility thread class 0.250" single mounting facility thread length 2.000" overall length circular wafer, bushing mount unef single mounting facility thread series
Used on strategic weapon systems (poseidon and trident).. 2a single mounting facility thread class 0.438" single mounting facility thread length 2.856" overall length weapon system essential circular wafer, bushing mount unef single mounting facility thread series
2b all threaded hole thread class 0.515" single connection inside diameter 0.380" all threaded hole thread length 4.940" overall length 3.440" overall width 20 all threaded hole thread quantity per inch uns all threaded hole thread series