2a single mounting facility thread class 0.417" single mounting facility thread length 2.112" overall length tap, circular, bushing mount unef single mounting facility thread series
2b all threaded hole thread class 3.344" overall length 1.875" overall width 32 all threaded hole thread quantity per inch rectangular unf all threaded hole thread series
Used on strategicweapon systems (poseidon and trident); atmosphere analyzing system; submarine atmosphere control and compressed air/gas. 1.937" overall length 1.312" overall width weapon system essential