| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.587 INCHES MINIMUM AND 0.612 INCHES MAXIMUM FIRST HOLE |
| FASTENER LENGTH | 0.687 INCHES MINIMUM AND 0.702 INCHES MAXIMUM |
| GROOVE DIAMETER | 0.191 INCHES MINIMUM AND 0.201 INCHES MAXIMUM |
| HEAD DIAMETER | 0.500 INCHES NOMINAL |
| HEAD HEIGHT | 0.125 INCHES NOMINAL |
| HEAD STYLE | BUTTON |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-B-6812 MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4140 OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SHANK UNTHREADED HOLE DIAMETER | 0.075 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD LENGTH | 0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 28 |