2a thread class right-hand 3.094" overall length 2.031" overall width 18 thread quantity per inch cadmium surface treated straight type w/cable clamp unef thread series
2b second mounting facility thread class right-hand second mounting facility 3.250" overall length 3.090" overall width 32 second mounting facility thread quantity per inch unc second mounting facility thread series
2b single mounting facility thread class 6.306" overall length 3.688" overall width 20 single mounting facility thread quantity per inch reciprocating action standard tap, circuit selector unc single mounting facility thread series