Used on shelter system m51, nbc;assault amphibious vehicle. 2a thread class right-hand pan head style 32 thread quantity per inch bright zinc zinc surface treated unf thread series
3a thread class right-hand 0.328" thread length flat chamfer head style 0.064" hole diameter 28 thread quantity per inch thread relieved 0.203 in. dia by 0.047 in lg under head unf thread series
3a thread class right-hand 0.750" thread length headless (setscrew) head style 28 thread quantity per inch navy special project nylon matl for non-standard point cadmium surface treated unf thread series
3a thread class right-hand 0.115" thread length headless (setscrew) head style 64 thread quantity per inch navy special project passivate surface treated unc thread series
3a thread class right-hand 0.250" thread length headless (setscrew) head style 24 thread quantity per inch cadmium or chromate surface treated unc thread series
Used on spec item. 3a thread class right-hand 0.072" thread length headless (setscrew) head style 56 thread quantity per inch cadmium surface treated unc thread series