3a thread class right-hand 0.312" thread length flat chamfer head style 1.000" grip length 24 thread quantity per inch retaining element in shank unf thread series
3a thread class right-hand 0.630" thread length double hexagon extended washer head style 2.435" grip length 32 thread quantity per inch unjf thread series
3a thread class right-hand 0.291" thread length flat countersunk head style 1.678" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.447" thread length flat countersunk head style 32 thread quantity per inch unthreaded portion of shank undercut to 0.162 in. dia cadmium surface treated unf thread series
3a thread class right-hand 1.563" thread length pan head style 32 thread quantity per inch navy special project passivate screw surface treated unc thread series