2a single mounting facility thread class 2.030" overall length 1.750" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
2b single mounting facility thread class 2.000" overall length 1.430" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
Used on type an/grc-3. 2b single mounting facility thread class 3.250" overall length 1.870" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series