| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| COUNTERBORE DIAMETER | 0.519 INCHES MINIMUM AND 0.529 INCHES MAXIMUM NUT |
| OVERALL HEIGHT | 0.473 INCHES MINIMUM AND 0.513 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 302 OR STEEL COMP 321 WASHER |
| MATERIAL | STEEL NUT |
| NOMINAL THREAD SIZE | 0.438 INCHES |
| NUT COUNTERBORE DEPTH | 0.249 INCHES MINIMUM AND 0.269 INCHES MAXIMUM NUT |
| NUT STYLE | FLAT WITH TURNED BACK EDGE |
| WASHER OUTSIDE DIAMETER | 0.755 INCHES MINIMUM AND 0.785 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.616 INCHES MINIMUM AND 0.627 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE WASHER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE NUT |
| SURFACE TREATMENT | CADMIUM NUT |
| SURFACE TREATMENT | PASSIVATE WASHER |
| TEMP RATING | 450.0 FAHRENHEIT MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 20 |