| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.4375 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.694 INCHES NOMINAL |
| FASTENER LENGTH | 2.241 INCHES MINIMUM AND |
| 2.271 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4340 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 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416A TY II CL 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 | 1.552 INCHES MINIMUM AND |
| 1.572 INCHES MAXIMUM |
| GRIP DIAMETER | 0.4360 INCHES MINIMUM AND |
| 0.4370 INCHES MAXIMUM |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.274 INCHES NOMINAL FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 1.106 INCHES NOMINAL ALL HOLES |
| SPECIFICATION/STANDARD DATA | 80205-NAS6607 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |