2a thread class right-hand 0.563" thread length square extended washer head style 0.062" hole diameter 0.083" grip length 20 thread quantity per inch unthreaded portion of shank 0.243 in. by 0.250 in. dia unc thread series
3a thread class right-hand 0.450" thread length hexagon head style 0.550" grip length 16 thread quantity per inch unthreaded portion of shank 0.372 to 0.374 in. dia unc thread series
2a thread class right-hand 0.500" thread length square extended washer head style 20 thread quantity per inch corners of square head rounded on 0.138 in. to 0.140 in. radius uns thread series
2a thread class right-hand 0.750" thread length square extended washer head style 20 thread quantity per inch unthreaded portion of shank 0.306 to 0.312 in. dia un thread series
3a thread class right-hand 1.300" thread length flat chamfer head style 11 thread quantity per inch threaded end has slot one in. lg 0.156 in. w unc thread series
3a thread class right-hand 0.750" thread length hexagon head style 18 thread quantity per inch groove 0.610 in. min, 0.620 in. max in. dia by 0.093 in. w phosphate surface treated unf thread series
2a thread class right-hand 0.375" thread length hexagon head style 24 thread quantity per inch undercut under head 0.100 in. w by 0.031 in. deep unc thread series
2a thread class right-hand 0.250" thread length hexagon head style 0.250" grip length 28 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 0.875" thread length hexagon head style 0.625" grip length 24 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 0.750" thread length square extended washer head style 24 thread quantity per inch top edge of washer rounded on 0.031 in. radius unf thread series
3a thread class right-hand 0.460" thread length hexagon head style 16 thread quantity per inch dog point 0.095 in. min 0.105 in. max long by 0.245 in. min 0.248 in. max dia unc thread series
