Used on wsd: nuclear power plants. 2a single mounting facility thread class 0.437" single mounting facility thread length 3.039" overall length three decks, one pole per deck, two positions per pole, non-shorting contacts; all current carrying memebers plated gold over nickel tap, circular, bushing mount unef single mounting facility thread series
2b thread class right-hand 3.940" overall length shorting cap backshell the shell finish is 1000 hour corrosion resistant. cadmium surface treated unef thread series