| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.625 INCHES |
| THREAD QUANTITY PER INCH | 5/8-18 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.661 INCHES MAXIMUM |
| FASTENER LENGTH | 3.830 INCHES MINIMUM AND |
| 3.850 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 410 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5613 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND |
| 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.396 INCHES MINIMUM AND |
| 0.416 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 1.052 INCHES MINIMUM AND |
| 1.064 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | HEXAGON FLATS |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 1 |
| HOLE DIAMETER | 0.070 INCHES NOMINAL |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.7465 INCHES MINIMUM AND |
| 0.7485 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 3.080 INCHES MINIMUM AND |
| 3.090 INCHES MAXIMUM FIRST SHOULDER |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 3.668 INCHES MINIMUM AND |
| 3.688 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.089 INCHES MINIMUM AND |
| 0.099 INCHES MAXIMUM FIRST HOLE |
| SPECIAL FEATURES | 2 COTTER PIN HOLES EQUALLY SPACED 90 DEG ON AXIS OF THD |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 05812 |
| DESIGN CONTROL REFERENCE | P38294 |