2a second mounting facility thread class right-hand second mounting facility 0.171" second mounting facility thread length 1.427" overall length 0.735" overall width 48 second mounting facility thread quantity per inch unc second mounting facility thread series
2b single mounting facility thread class 2.781" overall length 1.078" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
2a single mounting facility thread class 3.000" overall length 2.090" overall width 32 single mounting facility thread quantity per inch phase sensing unc single mounting facility thread series