3a thread class right-hand flush countersunk head style 0.927" grip length 24 thread quantity per inch 125000 single pounds per square inch shear strength slot located 0.550 in. from top of head; 0.120 in. lg passivate surface treated unjf thread series
3a thread class right-hand 0.381" thread length flat countersunk head style 0.302" grip length 32 thread quantity per inch cadmium surface treated unf thread series