| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.438 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.701 INCHES NOMINAL |
| FASTENER LENGTH | 2.326 INCHES MINIMUM AND |
| 2.356 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4140 OR |
| STEEL COMP 4340 OR |
| STEEL COMP 8740 OR |
| STEEL COMP 6150 OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TY2, CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND |
| 43.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| HEAD STYLE | SPLINE EXTENDED WASHER |
| HEAD HEIGHT | 0.383 INCHES MINIMUM AND |
| 0.403 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.807 INCHES MINIMUM AND |
| 0.817 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.053 INCHES MINIMUM AND |
| 0.073 INCHES MAXIMUM |
| HEAD MINOR DIAMETER | 0.485 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | SPLINE |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 4 |
| HOLE DIAMETER | 0.050 INCHES MINIMUM AND |
| 0.060 INCHES MAXIMUM |
| GRIP LENGTH | 1.615 INCHES MINIMUM AND |
| 1.635 INCHES MAXIMUM |
| GRIP DIAMETER | 0.436 INCHES MINIMUM AND |
| 0.437 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| 32.0 MICROINCHES GRIP |
| SPECIFICATION/STANDARD DATA | 80205-NASM21134 NATIONAL STD/SPEC |