| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| COUNTERBORE DIAMETER | 0.385 INCHES MINIMUM AND 0.395 INCHES MAXIMUM NUT |
| OVERALL HEIGHT | 0.436 INCHES MINIMUM AND 0.456 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| MATERIAL | IRON ALLOY 660 NUT |
| MATERIAL | STEEL COMP 302 OR STEEL COMP 321 WASHER |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| NONDEFINITIVE SPEC/STD DATA | A GRADE |
| NUT COUNTERBORE DEPTH | 0.203 INCHES MINIMUM AND 0.223 INCHES MAXIMUM NUT |
| NUT STYLE | FLAT WITH TURNED BACK EDGE |
| WASHER OUTSIDE DIAMETER | 0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.492 INCHES MINIMUM AND 0.502 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 QUANTITY PER INCH | 24 |
| THREAD SERIES | UNJF |