2a thread class right-hand 0.239" thread length fillister head style 0.037" hole diameter 48 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.314" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
2a thread class right-hand 0.191" thread length flat chamfer head style 36 thread quantity per inch lead screw surface treated thread relief under HEAD0.116 in. diameter by 0.054 in. wide uns thread series
2a thread class right-hand 0.453" thread length hexagon head style 20 thread quantity per inch axial hole 1/4in.-20 by 1/2in. deep in head cadmium surface treated unc thread series
3a thread class right-hand nut thread a 2.000" nut thread a thread length 15.500" overall length 8 nut thread a thread quantity per inch 0.250 in radius on both inside ends of thread un nut thread a thread series
3a thread class right-hand 5.500" overall length 16 thread quantity per inch navy special project one end flattened on parallel sides to 0.250 in. by 0.375 in. deep unc thread series
right-hand nut thread 0.490" stud thread thread length 1.340" overall length 18 stud thread thread quantity per inch 0.060 in. to 0.066 in. dia hole thru longitudinal axis of stud unc stud thread thread series
