Used on tristar aircraft. 3a thread class right-hand 0.323" thread length fillister countersunk head style 0.438" grip length 32 thread quantity per inch unjf thread series
3a thread class right-hand 0.342" thread length hexagon head style 32 thread quantity per inch aluminum pigment coating per bms 10-85 unjf thread series
3a thread class right-hand 0.431" thread length knurled no. 3 head style 32 thread quantity per inch oxide film screw surface treated unjf thread series
3a thread class right-hand 0.406" thread length hexagon head style 0.188" grip length 32 thread quantity per inch cadmium surface treated unf thread series