2a thread class right-hand 0.430" thread length hexagon head style 28 thread quantity per inch extension, head 0.100 in. o/a lg., 0.5140 in. 0.5145 in. diameter with 63 microinch finish; undercut passivate surface treated unf thread series
3a thread class right-hand 0.531" thread length hexagon head style 0.052" hole diameter 24 thread quantity per inch 0.031 in. w by 0.296 in. min. dia. undercut between shoulder phosphate manganese surface treated unf thread series
3a thread class right-hand 0.797" thread length double hexagon extended washer head style 24 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 0.551" thread length hexagon head style 18 thread quantity per inch navy special project nickel surface treated unf thread series
3a thread class right-hand 0.450" thread length double hexagon w/hole head style 28 thread quantity per inch navy special project undercut at thread 0.175 in. min to 0.195 in. max dia by 0.062 in. min to 0.072 in. max w, undercut at head 0.220 in. min to 0.240 in. max dia by 0.030 in. min to 0.050 in. max w cadmium surface treated unf thread series
3a thread class right-hand 0.508" thread length double hexagon extended washer head style 0.062" hole diameter 5/16-28 thread quantity per inch unc thread series
2a thread class right-hand 0.990" thread length dee chamfer head style 16 thread quantity per inch 0.340 in. long undercut below shoulder w/50.0 deg radius on 0.742 in. max dia zinc surface treated unf thread series
right-hand 1.062" thread length dee chamfer head style 16 thread quantity per inch 0.125 in. w by 10.0 deg taper at shoulder, 0.062 in. by 45.0 deg chamfer at taper finish to 0.749 in. dia, 0.062 in. by 45.0 deg chamfer at thread end cadmium or zinc surface treated unf thread series
