| THREAD SERIES DESIGNATOR | UNJF | 
| NOMINAL THREAD DIAMETER | 0.250 INCHES | 
| THREAD QUANTITY PER INCH | 28 | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.625 INCHES NOMINAL | 
| FASTENER LENGTH | 3.625 INCHES NOMINAL | 
| MATERIAL | STEEL OVERALL | 
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | 
| HEAD STYLE | DOUBLE HEXAGON W/HOLE | 
| HEAD HEIGHT | 0.303 INCHES NOMINAL | 
| WIDTH BETWEEN FLATS | 0.3125 INCHES NOMINAL | 
| EXTENDED WASHER DIAMETER | 0.438 INCHES NOMINAL | 
| EXTENDED WASHER THICKNESS | 0.060 INCHES MINIMUM | 
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 4 | 
| FIRST DIAMETER FROM HEAD | 0.244 INCHES MINIMUM AND | 
 | 0.249 INCHES MAXIMUM | 
| SECOND DIAMETER FROM HEAD | 0.190 INCHES MINIMUM AND | 
 | 0.195 INCHES MAXIMUM | 
| THIRD DIAMETER FROM HEAD | 0.2489 INCHES MINIMUM AND | 
 | 0.2495 INCHES MAXIMUM | 
| FOURTH DIAMETER FROM HEAD | 0.190 INCHES MINIMUM AND | 
 | 0.195 INCHES MAXIMUM | 
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.200 INCHES NOMINAL | 
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 1.400 INCHES NOMINAL | 
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER | 1.600 INCHES NOMINAL | 
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER | 3.000 INCHES NOMINAL | 
| THE MANUFACTURERS DATA |  | 
| MANUFACTURERS CODE | 63005 | 
| DESIGN CONTROL REFERENCE | 6886313 |