2a thread class right-hand 1.500" thread length hexagon head style 11 thread quantity per inch thru hole located 0.190 in from end of fastener, o.156 in. dia zinc surface treated unc thread series
2a thread class right-hand 4.250" thread length hexagon head style 13 thread quantity per inch undercut under head-length 0.040 in.min. passivate surface treated unc thread series
