| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.716 INCHES MINIMUM AND |
| 0.766 INCHES MAXIMUM |
| FASTENER LENGTH | 1.476 INCHES MINIMUM AND |
| 1.506 INCHES MAXIMUM |
| MATERIAL | STEEL COMP E4340 OR |
| STEEL COMP 4340 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 8735 OR |
| STEEL COMP 8740 OR |
| STEEL COMP 6150 OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NAS-672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND |
| 43.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| HEAD HEIGHT | 0.504 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.556 INCHES MINIMUM AND |
| 0.565 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.823 INCHES NOMINAL |
| EXTENDED WASHER THICKNESS | 0.123 INCHES NOMINAL |
| GRIP LENGTH | 0.740 INCHES MINIMUM AND |
| 0.760 INCHES MAXIMUM |
| GRIP DIAMETER | 0.4985 INCHES MINIMUM AND |
| 0.4995 INCHES MAXIMUM |
| SPECIAL FEATURES | DRILLED HEAD |
| SPECIFICATION/STANDARD DATA | 80205-NAS628 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |