| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| COUNTERBORE DIAMETER | 0.255 INCHES MINIMUM AND 0.275 INCHES MAXIMUM NUT |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| OVERALL HEIGHT | 0.319 INCHES MINIMUM AND 0.339 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 8740 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT COUNTERBORE DEPTH | 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM NUT |
| NUT STYLE | DOUBLE HEXAGON |
| SPECIAL FEATURES | 6 SCALLOPS EQUALLY SPACED ON WASHER IN RELATION TO DOUBLE HEXAGON |
| WASHER OUTSIDE DIAMETER | 0.433 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
| WASHER THICKNESS | 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.312 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES | UNJF |