3a thread class right-hand 1.720" thread length hexagon head style 13 thread quantity per inch this bolt contains an undercut between the shoulder unc thread series
2a thread class right-hand 0.175" thread length hexagon head style 0.046" hole diameter 32 thread quantity per inch navy special project passivate surface treated unf thread series
3a thread class right-hand 0.266" thread length hexagon head style 28 thread quantity per inch dry film lubricant on shoulder cadmium threads surface treated unjf thread series
3a thread class right-hand 1.050" thread length round w/wrench flats head style 16 thread quantity per inch shoulder with microinch finish of 25 unf thread series