3b thread class right-hand 0.399" thread length 24 thread quantity per inch has internal thread lock passivate surface treated grooved keylock unjf thread series
3a thread class right-hand 0.291" thread length hexagon head style 0.046" hole diameter 0.428" grip length 28 thread quantity per inch unjf thread series
3a thread class right-hand 0.345" thread length dished hexagon head style 1.428" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.439" thread length flat chamfer head style 64 thread quantity per inch color black oxide surface treated unrf thread series
2a thread class right-hand 0.408" thread length hexagon extended washer head style 32 thread quantity per inch cadmium surface treated unf thread series