2b thread class right-hand 5.000" overall length 1.750" overall width 18 thread quantity per inch cadmium surface treated straight type w/cable clamp unef thread series
2a single mounting facility thread class 2.750" overall length 14 single mounting facility thread quantity per inch un single mounting facility thread series
2b single mounting facility thread class 3.313" overall length 2.130" overall width 32 single mounting facility thread quantity per inch tap, circuit selector unc single mounting facility thread series