| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.413 INCHES MINIMUM AND |
| 0.463 INCHES MAXIMUM |
| FASTENER LENGTH | 0.611 INCHES MINIMUM AND |
| 0.641 INCHES MAXIMUM |
| MATERIAL | STEEL COMP E4340 OR |
| STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR |
| MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR |
| AMS 6322 ASSN STD 2ND MATERIAL RESPONSE 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 | 36.0 ROCKWELL C MINIMUM AND |
| 40.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HEAD STYLE | DISHED HEXAGON |
| HEAD HEIGHT | 0.156 INCHES MINIMUM AND |
| 0.171 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.492 INCHES MINIMUM AND |
| 0.502 INCHES MAXIMUM |
| HOLE CONFIGURATION STYLE | HEXAGON CORNERS |
| HOLE TYPE | DRILLED |
| HOLE QUANTITY | 3 |
| HOLE DIAMETER | 0.070 INCHES MINIMUM AND |
| 0.080 INCHES MAXIMUM |
| GRIP LENGTH | 0.178 INCHES MINIMUM AND |
| 0.198 INCHES MAXIMUM |
| GRIP DIAMETER | 0.3110 INCHES MINIMUM AND |
| 0.3120 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| 32.0 MICROINCHES GRIP |
| 32.0 MICROINCHES THREADS |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.419 INCHES MINIMUM AND |
| 0.469 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND |
| 0.086 INCHES MAXIMUM FIRST HOLE |
| SPECIFICATION/STANDARD DATA | 80205-NAS6205 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |