2a thread class right-hand 0.156" thread length headless (setscrew) head style 40 thread quantity per inch nylon insert in threads passivate surface treated unc thread series
2a thread class right-hand 0.188" thread length headless (setscrew) head style 40 thread quantity per inch navy special project passivate surface treated unc thread series
2a thread class right-hand 0.250" thread length headless (setscrew) head style 32 thread quantity per inch navy special project passivate surface treated unc thread series