3a thread class right-hand 1.151" thread length flat countersunk head style 18 thread quantity per inch zinc fastener surface treated unc thread series
3a thread class right-hand 1.250" thread length 18 thread quantity per inch navy special project phosphate manganese or phosphate zinc surface treated round bend unc thread series
3a thread class right-hand 0.568" thread length double hexagon w/hole head style 32 thread quantity per inch cadmium surface treated unjf thread series
3b thread class right-hand flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 1.156" grip length 28 thread quantity per inch furnished without bolt unf thread series
3b thread class right-hand flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 1.093" grip length 28 thread quantity per inch furnished without bolt unf thread series
3b thread class right-hand flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.968" grip length 28 thread quantity per inch furnished without bolt unf thread series
3b thread class right-hand flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.906" grip length 28 thread quantity per inch furnished without bolt unf thread series
3b thread class right-hand flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.843" grip length 28 thread quantity per inch furnished without bolt unf thread series
3b thread class right-hand flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.781" grip length 28 thread quantity per inch furnished with out bolt unf thread series
2a thread class right-hand 0.694" thread length flat countersunk undercut head style 28 thread quantity per inch head chamfered 0.060 wide passivate surface treated unf thread series
2a thread class right-hand 0.785" thread length fillister head style 16 thread quantity per inch passivate surface treated counterbore threaded unc thread series