2a thread class right-hand 0.250" thread length fillister head style 44 thread quantity per inch navy special project nickel screw surface treated unf thread series
2a thread class right-hand 0.562" thread length oval countersunk head style 18 thread quantity per inch phosphate screw surface treated unc thread series
2a thread class right-hand 0.410" thread length flat countersunk head style 24 thread quantity per inch phosphate screw surface treated unf thread series
2a thread class right-hand 0.180" thread length fillister extended washer head style 40 thread quantity per inch navy special project unf thread series
3a thread class right-hand 0.164" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series
2a thread class right-hand 0.971" thread length flat countersunk head style 13 thread quantity per inch passivate screw surface treated unc thread series