Used on various. 2b single mounting facility thread class 5.063" overall length 4.375" overall width 20 single mounting facility thread quantity per inch tap, circuit selector unc single mounting facility 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 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 second mounting facility thread class right-hand second mounting facility 3.320" overall length 3.250" overall width 32 second mounting facility thread quantity per inch unc second mounting facility 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