flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.563" grip length anodize or chromate sleeve surface treated
3a thread class right-hand 0.304" thread length oval countersunk head style 0.740" grip length 28 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.338" thread length flat countersunk head style 1.178" grip length 32 thread quantity per inch passivate surface treated unjf thread series
Used on aircraft, hornet f/a-18 (e/f). 3a thread class right-hand 0.296" thread length spline drive shear head head style 0.552" grip length 28 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.305" thread length spline drive shear head head style 1.302" grip length 32 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.380" thread length flat countersunk undercut head style 32 thread quantity per inch furnished with one o-ring unjf thread series
3a thread class right-hand 0.380" thread length flat countersunk undercut head style 32 thread quantity per inch furnished with one o-ring unjf thread series
3a thread class right-hand 1.380" thread length flat chamfer head style 14 thread quantity per inch undercut below head 0.900 inch dia., 0.100 inch lg. undercut 0n shank end 0.900 inch dia., 0.180 inch lg uns thread series
3a thread class right-hand 0.850" thread length double hexagon w/hole head style 0.050" hole diameter 0.990" grip length 18 thread quantity per inch asymmetric thread; 4 slots on head unf thread series
