2a thread class right-hand 0.262" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.460" thread length round w/wrench flats head style 32 thread quantity per inch two drilled holes thru shoulder 90 deg apart 0.070 in. dia 0.230 in. from head bearing surface unf thread series
2a thread class right-hand 0.344" thread length hexagon head style 20 thread quantity per inch non-standard point style 12 0.312 in. nom lg passivate surface treated unc thread series