3a thread class right-hand 0.296" thread length spline drive shear head head style 4.802" grip length 28 thread quantity per inch passivate surface treated unjf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.126" grip length ns" letters after the material code "b" indicate no preference to lock type (may be visible or internal) . rivets with no letter code (indicating visible lock type) chromate sleeve surface treated
3a thread class right-hand 0.237" thread length flat countersunk head style 0.615" grip length 28 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.552" thread length spline drive shear head head style 2.678" grip length 16 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.554" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unjf thread series
3a thread class right-hand 0.520" thread length double hexagon extended washer head style 0.464" grip length 28 thread quantity per inch unjf thread series
3a thread class right-hand 0.575" thread length double hexagon extended washer head style 0.589" grip length 24 thread quantity per inch unjf thread series