3a thread class right-hand 0.589" thread length double hexagon w/hole head style 24 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.387" thread length flat chamfer head style 24 thread quantity per inch passivate fastener surface treated unrc thread series
Used on w/s:aircraft, hercules c-130. 3a thread class right-hand 0.510" grip length 32 thread quantity per inch 108000 single pounds per square inch shear strength cadmium surface treated unjc thread series
3b thread class right-hand flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.188" grip length 24 thread quantity per inch 125000 single pounds per square inch shear strength furnished w/o bolt cadmium expander surface treated unjc thread series
3a thread class right-hand 0.320" thread length hexagon head style 4.115" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.378" thread length flat countersunk head style 0.865" grip length 28 thread quantity per inch internal drive ribbed unjf thread series
3a thread class right-hand 0.295" thread length button head style 40 thread quantity per inch navy special project color black oxide surface treated unrc thread series