| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.498 INCHES NOMINAL |
| FASTENER LENGTH | 1.383 INCHES NOMINAL |
| MATERIAL | STEEL COMP 8630 OR |
| STEEL COMP 8735 OR |
| STEEL COMP 4130 OR |
| STEEL COMP 4037 OR |
| STEEL COMP 4140 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6050 MIL SPEC 1ST MATERIAL RESPONSE OR |
| MIL-S-6098 MIL SPEC 2ND MATERIAL RESPONSE OR |
| MILS-6758 MIL SPEC 3RD MATERIAL RESPONSE OR |
| AMS6300 ASSN STD 4TH MATERIAL RESPONSE OR |
| MIL-S-5626 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYII, CL 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.203 INCHES MINIMUM AND |
| 0.235 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.553 INCHES MINIMUM AND |
| 0.565 INCHES MAXIMUM |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.371 INCHES MINIMUM AND |
| 0.374 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.885 INCHES NOMINAL FIRST SHOULDER |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.202 INCHES NOMINAL OVERALL |
| SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES NOMINAL OVERALL |