| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.340 INCHES MINIMUM AND |
| 0.362 INCHES MAXIMUM |
| FASTENER LENGTH | 3.620 INCHES MINIMUM AND |
| 3.660 INCHES MAXIMUM |
| MATERIAL | NICKEL ALLOY OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5667 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CHROMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2406 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM OVERALL |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| SHOULDER DIAMETER | 0.538 INCHES MINIMUM AND |
| 0.539 INCHES MAXIMUM |
| SHOULDER LENGTH | 3.413 INCHES MINIMUM AND |
| 3.415 INCHES MAXIMUM |
| CONCENTRIC HOLE DEPTH | 3.260 INCHES MINIMUM AND |
| 3.300 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.329 INCHES MINIMUM AND |
| 0.349 INCHES MAXIMUM |
| HEAD DIAMETER | 0.820 INCHES MINIMUM AND |
| 0.860 INCHES MAXIMUM |
| HEAD HEIGHT | 0.115 INCHES MINIMUM AND |
| 0.135 INCHES MAXIMUM |
| DISTANCE FROM CENTERLINE TO FLAT | 0.315 INCHES MINIMUM AND |
| 0.325 INCHES MAXIMUM |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 3.510 INCHES MINIMUM AND |
| 3.540 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.065 INCHES MINIMUM AND |
| 0.072 INCHES MAXIMUM FIRST HOLE |