3a thread class right-hand 2.000" thread length fillister head style 10 thread quantity per inch critical tiem hydrogen embrittlement relief required zinc surface treated unc thread series
2a thread class right-hand 0.281" thread length fillister head style 40 thread quantity per inch navy special project cadmium surface treated unc thread series
3a thread class right-hand 0.410" thread length hexagon head style 28 thread quantity per inch w/internal socket drive in head passivate surface treated unf thread series
Used on aircraft, thunderbolt ii, a-10; aircraft, stratolifter c-135. 3a thread class right-hand 1.630" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.650" thread length flat countersunk head style 2.990" grip length 20 thread quantity per inch navy special project cadmium surface treated unjf thread series
3a thread class right-hand 0.350" thread length dished hexagon head style 3.490" grip length 24 thread quantity per inch cadmium surface treated unjf thread series