| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.460 INCHES MAXIMUM |
| FASTENER LENGTH | 1.910 INCHES NOMINAL |
| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6382 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND |
| 32.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.100 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.428 INCHES MINIMUM AND |
| 0.440 INCHES MAXIMUM |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 5 |
| FIRST DIAMETER FROM HEAD | 0.255 INCHES MINIMUM AND |
| 0.257 INCHES MAXIMUM |
| SECOND DIAMETER FROM HEAD | 0.182 INCHES MINIMUM AND |
| 0.188 INCHES MAXIMUM |
| THIRD DIAMETER FROM HEAD | 0.255 INCHES MINIMUM AND |
| 0.257 INCHES MAXIMUM |
| FOURTH DIAMETER FROM HEAD | 0.182 INCHES MINIMUM AND |
| 0.188 INCHES MAXIMUM |
| FIFTH DIAMETER FROM HEAD | 0.255 INCHES MINIMUM AND |
| 0.257 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.140 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.640 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER | 0.840 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER | 1.280 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIFTH DIAMETER | 1.360 INCHES NOMINAL |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 03104 |
| DESIGN CONTROL REFERENCE | 706420 |