| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.3125 INCHES |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 3.425 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASM6415 NATIONAL STD SINGLE MATERIAL RESPONSE OR |
| AMS6484 NATIONAL STD SINGLE MATERIAL RESPONSE OR |
| AMS6349 NATIONAL STD SINGLE MATERIAL RESPONSE OR |
| AMS6382 NATIONAL STD SINGLE MATERIAL RESPONSE OR |
| AMS6322 NATIONAL STD SINGLE MATERIAL RESPONSE OR |
| AMS6325 NATIONAL STD SINGLE MATERIAL RESPONSE OR |
| AMS6327 NATIONAL STD SINGLE MATERIAL RESPONSE OR |
| AMS-S-6758 NATIONAL STD SINGLE MATERIAL RESPONSE OR |
| AMS6448 NATIONAL STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-416, TYPE II, CLASS 2 NATIONAL STD ALL TREATMENT RESPONSES OVERALL |
| HEAD STYLE | CROWNED HEXAGON |
| HEAD HEIGHT | 0.157 INCHES MINIMUM AND |
| 0.172 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.557 INCHES MINIMUM |
| GRIP LENGTH | 2.938 INCHES MINIMUM AND |
| 2.954 INCHES MAXIMUM |
| GRIP DIAMETER | 0.3108 INCHES MINIMUM AND |
| 0.3117 INCHES MAXIMUM |
| SPECIAL FEATURES | BOLT ULTIMATE TENSILE STRENGTH LBF MIN: 7,510. IMPEDANCE TYPE: RING LOCK. HEAT TREATMENT: AMS2759 TO ROCKWELL C36 TO C41. |