3a thread class right-hand 0.363" thread length flat chamfer head style 20 thread quantity per inch undercut under head 0.031 in. wide passivate surface treated unc thread series
2a thread class right-hand 0.333" thread length flat chamfer head style 32 thread quantity per inch phosphate manganese screw surface treated unc thread series
2a thread class right-hand 0.547" thread length hexagon head style 18 thread quantity per inch strip locking element on thread phosphate surface treated unrc thread series
2a thread class right-hand 0.875" thread length hexagon extended washer head style 16 thread quantity per inch finish color black phosphate surface treated unc thread series