| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 1.000 INCHES |
| THREAD QUANTITY PER INCH | 12 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.840 INCHES MINIMUM |
| FASTENER LENGTH | 7.140 INCHES NOMINAL |
| MATERIAL | STEEL COMP 4340 OVERALL |
| SURFACE TREATMENT | NICKEL HEAD |
| NICKEL GRIP |
| CADMIUM THREADS |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | SS8428 DALIC FSCM 78286 MFR REF SINGLE TREATMENT RESPONSE THREADS |
| HARDNESS RATING | 51.0 ROCKWELL C MINIMUM AND |
| 54.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 260000 POUNDS PER SQUARE INCH |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| CONCENTRIC HOLE DEPTH | 1.475 INCHES NOMINAL |
| CONCENTRIC HOLE DIAMETER | 0.750 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.500 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 1.427 INCHES MINIMUM AND |
| 1.440 INCHES MAXIMUM |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 6.800 INCHES NOMINAL FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.141 INCHES MINIMUM AND |
| 0.151 INCHES MAXIMUM FIRST HOLE |
| SPECIAL FEATURES | COUNTERBORE HEAD 0.750 INCH DIA BY 1.700 INCH DEPTH |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 78286 |
| DESIGN CONTROL REFERENCE | 65251-08208-101 |