Used on an/apm-435. 2b thread class right-hand 0.750" overall length 18 thread quantity per inch cadmium surface treated straight type unef thread series
2b thread class right-hand 0.890" overall length 20 thread quantity per inch cadmium surface treated double clamping action open frame type unf thread series
2b thread class right-hand 2.120" overall length 1.120" overall width 40 thread quantity per inch copper surface treated hood, top opening unc thread series
2a single mounting facility thread class 0.810" overall length 0.410" overall width 40 single mounting facility thread quantity per inch unc single mounting facility thread series