| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.250 INCHES NOMINAL FIRST HOLE |
| CONCENTRIC HOLE DEPTH | 0.780 INCHES NOMINAL |
| CONCENTRIC HOLE DIAMETER | 0.172 INCHES MINIMUM AND 0.178 INCHES MAXIMUM |
| COUNTERBORE DEPTH | 0.060 INCHES NOMINAL |
| COUNTERBORE DIAMETER | 0.250 INCHES NOMINAL |
| FASTENER LENGTH | 0.906 INCHES NOMINAL |
| HEAD HEIGHT | 0.165 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| HOLE CONFIGURATION STYLE | HEXAGON CORNERS |
| HOLE DIAMETER | 0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM |
| HOLE QUANTITY | 2 |
| HOLE TYPE | DRILLED |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 303 OVERALL |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| SHANK UNTHREADED HOLE DIAMETER | 0.172 INCHES MINIMUM FIRST HOLE AND 0.178 INCHES MAXIMUM FIRST HOLE |
| SPECIAL FEATURES | SURFACE FINISH THREADS 32.0 MICROINCHES; 63.0 MICROINCHES ON SHANK; 32.0MICROINCHES ON NECK; UNDERCUT 0.75 IN. MIN,0.090 IN. MAX LG; NECK DIA 0.380-0.390 IN.; 0.094 IN. NOM LG |
| WIDTH BETWEEN FLATS | 0.680 INCHES NOMINAL |
| STYLE DESIGNATOR | COUNTERBORE UNTHREADED |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.331 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |