3a thread class right-hand 0.437" thread length hexagon head style 5.546" grip length 20 thread quantity per inch oxide film surface treated unc thread series
2a thread class right-hand 0.575" thread length hexagon head style 24 thread quantity per inch with 0.030 in. wide 0.590 in. dia undercut under head passivate surface treated unf thread series
2a nut thread a thread class right-hand nut thread a 1.500" nut thread a thread length 16.125" overall length 28 nut thread a thread quantity per inch color yellow paint surface treated unf nut thread a thread series
3a thread class right-hand 0.217" thread length round head style 32 thread quantity per inch navy special project nickel surface treated unc thread series
3a thread class right-hand 0.172" thread length flat chamfer head style 40 thread quantity per inch navy special project nickel surface treated unc thread series
2a thread class right-hand 1.188" thread length hexagon head style 0.062" hole diameter 24 thread quantity per inch zinc surface treated unf thread series
3a thread class right-hand 0.490" thread length flat countersunk head style 0.140" grip length 28 thread quantity per inch cadmium surface treated unf thread series