Used on guardrail(systems 1-4); fire pumps. 2a thread class right-hand 0.938" thread length flat countersunk head style 32 thread quantity per inch unf thread series
2a thread class right-hand 0.200" thread length fillister head style 0.046" hole diameter 40 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 1.554" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.656" thread length oval countersunk head style 20 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.656" thread length flat countersunk head style 20 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.656" thread length flat countersunk head style 20 thread quantity per inch passivate screw surface treated unf thread series
2a thread class right-hand 0.500" thread length flat countersunk head style 16 thread quantity per inch surface treatment - black oxide unc thread series
3a thread class right-hand 0.313" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated unf thread series