flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 85000 single pounds per square inch shear strength passivate surface treated
2a thread class right-hand 0.094" thread length pan no. 2 head style 56 thread quantity per inch finish color black oxide surface treated unc thread series
3a thread class right-hand 0.552" grip length 28 thread quantity per inch 125000 single pounds per square inch shear strength passivate surface treated unjf thread series
3a thread class right-hand 0.615" grip length 28 thread quantity per inch 125000 single pounds per square inch shear strength passivate surface treated unjf thread series
3a thread class right-hand 0.400" thread length dished hexagon head style 5.740" grip length 28 thread quantity per inch cadmium surface treated unjf thread series