2b single mounting facility thread class 3.438" overall length 2.500" overall width 24 single mounting facility thread quantity per inch unc single mounting facility thread series
2a single mounting facility thread class 0.437" single mounting facility thread length 2.149" overall length 32 single mounting facility thread quantity per inch tap, circular, bushing mount unc single mounting facility thread series
5.650" overall length 0.250" overall width left side d shaped socket guide rotated 180.0 deg, right side d shaped pin @guide rotated 270.0 deg clockwise from normal
5.650" overall length 0.250" overall width left side d shaped pin guide rotated 90.0 deg, right side d shaped socket guide rotated 90.0 deg clockwise from normal