2a thread class right-hand 0.750" thread length flat countersunk head style 20 thread quantity per inch cadmium screw surface treated unc thread series
2a nut thread thread class right-hand nut thread 0.320" stud thread thread length 1.610" overall length 28 nut thread thread quantity per inch hex recess in stud end, 0.130 in.dp x 0.125 in. wd across flats; stud end shoulder taperred 5 deg toward center; used on door light in-flight refueling b-52 aircraft shouldered unf nut thread thread series
3a thread class right-hand 0.662" thread length bevel-conical head style 24 thread quantity per inch 2 holes perpendicular to axis, 0.125 in. dia, 1.040 in. top of head to first hole center, 0.860 in. c to c of holes; bottom of head chamfered 0.090 in. lg by 45.0 deg cadmium surface treated unf thread series
2a thread class right-hand 0.160" thread length flat chamfer head style 0.064" hole diameter 28 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.609" thread length hexagon head style 0.296" grip length 24 thread quantity per inch cadmium surface treated unf thread series
