| COUNTERBORE DIAMETER | 0.519 INCHES MINIMUM AND 0.529 INCHES MAXIMUM FIRST END |
| NUT COUNTERBORE DEPTH | 0.249 INCHES MINIMUM AND 0.269 INCHES MAXIMUM FIRST END |
| NUT HEIGHT | 0.281 INCHES NOMINAL |
| NUT STYLE | FLAT WITH TURNED BACK EDGE |
| OVERALL HEIGHT | 0.530 INCHES MINIMUM AND 0.550 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE WASHER |
| MATERIAL | IRON ALLOY 660 NUT |
| MATERIAL | STEEL COMP 302 WASHER |
| NOMINAL THREAD SIZE | 0.438 INCHES |
| WASHER OUTSIDE DIAMETER | 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 OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 20 |