2a thread class right-hand 1.640" thread length pan head style 20 thread quantity per inch passivate screw surface treated 0.080 in. min, 0.100 in. max dia hole drilled entire lg of longitudinal axis of screw unc thread series
3a thread class right-hand 0.283" thread length hexagon head style 0.072" grip length 32 thread quantity per inch nickel surface treated unjf thread series
Used on an/alq-101 peculiar. 3a thread class right-hand 0.654" thread length flat chamfer head style 0.047" hole diameter 28 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 0.730" thread length knurled no. 1 head style 16 thread quantity per inch navy special project bronze chromate cadmium surface treated unc thread series
3a thread class right-hand 0.220" thread length flat countersunk head style 0.428" grip length 28 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.546" thread length hexagon head style 0.268" grip length 24 thread quantity per inch groove in head 0.090 in. to 0.150 in. wide by 0.520 in. dia unf thread series
