| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.3125 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.579 INCHES NOMINAL |
| FASTENER LENGTH | 2.553 INCHES NOMINAL |
| MATERIAL | STEEL COMP E4340 AND |
| STEEL COMP 4140 AND |
| STEEL COMP 4340 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE AND |
| AMS 5000-S ASSN STD SINGLE MATERIAL RESPONSE AND |
| AMS 6382 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-416 TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND |
| 43.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 11100 POUNDS PER SQUARE INCH |
| HEAD STYLE | SPLINE EXTENDED WASHER |
| HEAD HEIGHT | 0.348 INCHES NOMINAL |
| EXTENDED WASHER DIAMETER | 0.521 INCHES MINIMUM AND |
| 0.531 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.082 INCHES NOMINAL |
| HEAD MINOR DIAMETER | 0.360 INCHES MINIMUM AND |
| 0.375 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | DOUBLE HEXAGON LONGITUDINAL HOLE |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 4 |
| GRIP LENGTH | 1.974 INCHES NOMINAL |
| GRIP DIAMETER | 0.3110 INCHES MINIMUM AND |
| 0.3120 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| 32.0 MICROINCHES GRIP |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, TENSION, STEEL, EXTERNAL WRENCHING, FLANGED, 12-POINT, 180 KSI FTU, 450 DEG F |