3a thread class right-hand 0.670" thread length flat chamfer head style 0.035" hole diameter 40 thread quantity per inch passivate surface treated unrf thread series
3a thread class right-hand 0.755" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength cadmium surface treated unjf thread series
2a thread class right-hand 0.380" thread length knurled no. 4 head style 32 thread quantity per inch point threaded 4-40 unc 2a, 0.380 in. long passivate surface treated unc thread series