3a thread class right-hand 0.399" thread length flat countersunk head style 28 thread quantity per inch cadmium or cadmium screw surface treated internal drive ribbed unjf thread series
3a thread class right-hand flush countersunk head style 0.255" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength one collar included cadmium surface treated unjf thread series
3a thread class right-hand flush countersunk head style 1.260" grip length 24 thread quantity per inch 125000 single pounds per square inch shear strength unjf thread series
3a thread class right-hand flush countersunk head style 0.885" grip length 24 thread quantity per inch 125000 single pounds per square inch shear strength unjf thread series
3a thread class right-hand flush countersunk head style 0.760" grip length 24 thread quantity per inch 125000 single pounds per square inch shear strength unjf thread series
3a thread class right-hand 0.630" grip length 24 thread quantity per inch 125000 single pounds per square inch shear strength cadmium surface treated unjf thread series
3a thread class right-hand 1.067" grip length 28 thread quantity per inch 125000 single pounds per square inch shear strength cadmium surface treated unjf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.687" 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
