| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.438 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.669 INCHES MINIMUM AND |
| 0.719 INCHES MAXIMUM |
| FASTENER LENGTH | 0.867 INCHES MINIMUM AND |
| 0.897 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 |
| AMS6322 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE 2, CLASS 2 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 | 0.219 INCHES MINIMUM AND |
| 0.234 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.678 INCHES MINIMUM AND |
| 0.690 INCHES MAXIMUM |
| GRIP LENGTH | 0.178 INCHES MINIMUM AND |
| 0.198 INCHES MAXIMUM |
| GRIP DIAMETER | 0.4320 INCHES MINIMUM AND |
| 0.4325 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205 NAS6607 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, HEX HEAD |