3a thread class right-hand 0.290" thread length hexagon head style 20 thread quantity per inch chromium grip surface treated concentric hole unthreaded unf thread series
3a nut thread thread class right-hand nut thread 0.520" stud thread thread length 2.920" overall length 24 nut thread thread quantity per inch hexagon on stud end 0.249 in. across flats x 0.310 in. lon; shouldered unf nut thread thread series
3a thread class right-hand 0.490" thread length flat chamfer head style 0.046" hole diameter 32 thread quantity per inch passivate surface treated unc thread series
2a nut thread a thread class right-hand nut thread a 0.625" nut thread a thread length 22.125" overall length 18 nut thread a thread quantity per inch w/cone point 40 to 50 degrees 0.125 to 0.141 in. lg zinc surface treated unc nut thread a thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.290" grip length 75000 single pounds per square inch shear strength cadmium surface treated
3a thread class right-hand 0.290" thread length flat chamfer head style 0.040" hole diameter 32 thread quantity per inch cadmium surface treated unc thread series
3a thread class right-hand 0.375" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unf thread series