2a thread class right-hand 1.250" thread length hexagon head style 0.094" hole diameter 20 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.375" thread length hexagon head style 0.552" grip length 24 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.400" thread length dished hexagon head style 0.115" grip length 28 thread quantity per inch with strip type element in threads for locking feature cadmium surface treated unjf thread series
3a thread class right-hand 0.400" thread length dished hexagon head style 0.178" grip length 28 thread quantity per inch with strip type element in threads for locking feature cadmium surface treated unjf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.376" grip length anodize sleeve or chromate sleeve surface treated
3a thread class right-hand 0.469" thread length flat countersunk head style 2.750" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
2a nut thread thread class right-hand nut thread 0.310" stud thread thread length 32 nut thread thread quantity per inch slotted on stud end 0.040 in. min to 0.050 in. max wide, 0.045 in. deep passivate surface treated shouldered unc nut thread thread series