3a thread class right-hand 0.522" thread length pan no. 2 head style 32 thread quantity per inch head vertically knurled anodize head surface treated unf thread series
3a thread class right-hand 0.291" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unf thread series
2a thread class right-hand 0.520" thread length hexagon head style 0.062" hole diameter 28 thread quantity per inch chromium grip surface treated unf thread series
3a thread class right-hand 0.251" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unf thread series
2a thread class right-hand 0.330" thread length hexagon head style 28 thread quantity per inch threaded portion is between the first passivate surface treated unf thread series