2a thread class right-hand 0.158" thread length hexagon head style 32 thread quantity per inch one center drill 0.070 each end optional unc thread series
3a thread class right-hand 0.931" thread length double hexagon extended washer head style 1.026" grip length 20 thread quantity per inch unjf thread series
3a thread class right-hand 0.740" thread length double hexagon extended washer head style 1.369" grip length 28 thread quantity per inch unjf thread series