3a thread class right-hand 0.230" thread length hexagon head style 28 thread quantity per inch altered from NAS1297 cadmium surface treated unjf thread series
universal 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 0.386" thread length flat countersunk head style 1.178" grip length 28 thread quantity per inch navy special project cadmium or cadmium surface treated unjf thread series
3a thread class right-hand 0.378" thread length pan no. 2 head style 0.240" grip length 28 thread quantity per inch navy special project cadmium surface treated unjf thread series
3a thread class right-hand 0.338" thread length pan no. 2 head style 0.552" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.320" thread length dished hexagon head style 0.490" grip length 32 thread quantity per inch aluminum surface treated unjf thread series
3a thread class right-hand 0.533" thread length flat chamfer head style 32 thread quantity per inch cadmium fastener surface treated unrf thread series
2a thread class right-hand 0.388" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated head color 36231 per fed std 595 unc thread series
