| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.245 INCHES NOMINAL |
| FASTENER LENGTH | 0.961 INCHES MINIMUM AND |
| 0.981 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 7477 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CHROMIUM GRIP |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2406 ASSN STD SINGLE TREATMENT RESPONSE GRIP |
| HARDNESS RATING | 24.0 ROCKWELL C MINIMUM OVERALL |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| HEAD HEIGHT | 0.248 INCHES MINIMUM AND |
| 0.268 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.250 INCHES NOMINAL |
| EXTENDED WASHER DIAMETER | 0.365 INCHES MINIMUM AND |
| 0.385 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.050 INCHES NOMINAL |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |
| FIRST DIAMETER FROM HEAD | 0.244 INCHES MINIMUM AND |
| 0.246 INCHES MAXIMUM |
| SECOND DIAMETER FROM HEAD | 0.142 INCHES MINIMUM AND |
| 0.146 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.556 INCHES MINIMUM AND |
| 0.576 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.726 INCHES NOMINAL |
| SPECIAL FEATURES | CENTER HOLE ON TOP OF HEAD 0.090/0.110 IN. DIA X 0.128 IN. NOM DEEP |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 77445 |
| DESIGN CONTROL REFERENCE | 4076771 |