| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3A |
| THREAD LENGTH | 0.590 INCHES NOMINAL |
| FASTENER LENGTH | 2.250 INCHES NOMINAL |
| MINIMUM TENSILE STRENGTH | 175000 POUNDS PER SQUARE INCH |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.220 INCHES NOMINAL |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.126 INCHES NOMINAL FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.079 INCHES MINIMUM AND |
| 0.084 INCHES MAXIMUM FIRST HOLE |
| FIRST DIAMETER FROM HEAD | 0.372 INCHES MINIMUM AND |
| 0.373 INCHES MAXIMUM |
| SECOND DIAMETER FROM HEAD | 0.310 INCHES MINIMUM AND |
| 0.315 INCHES MAXIMUM |
| THIRD DIAMETER FROM HEAD | 0.372 INCHES MINIMUM AND |
| 0.373 INCHES MAXIMUM |
| FOURTH DIAMETER FROM HEAD | 0.315 INCHES MINIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.190 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.660 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER | 1.040 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER | 1.660 INCHES NOMINAL |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 28839 |
| DESIGN CONTROL REFERENCE | 628927 |