| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 2.438 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF TENTH DIAMETER | 3.625 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER | 3.063 INCHES NOMINAL |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |
| FASTENER LENGTH | 4.050 INCHES NOMINAL |
| FOURTH DIAMETER FROM HEAD | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| HEAD HEIGHT | 0.110 INCHES NOMINAL |
| HEAD STYLE | DISHED HEXAGON |
| MATERIAL | ALUMINUM ALLOY OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SECOND DIAMETER FROM HEAD | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| THREAD DIRECTION | RIGHT-HAND |
| THIRD DIAMETER FROM HEAD | 0.185 INCHES MINIMUM AND 0.188 INCHES MAXIMUM |
| THREAD LENGTH | 0.425 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 28 |