| COUNTERBORE DIAMETER | 0.342 INCHES MINIMUM AND 0.352 INCHES MAXIMUM NUT |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| NUT STYLE | DOUBLE HEXAGON |
| OVERALL HEIGHT | 0.312 INCHES MINIMUM AND 0.332 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE WASHER |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| MATERIAL | IRON ALLOY 660 NUT |
| MATERIAL | IRON ALLOY 660 WASHER |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| WASHER THICKNESS | 0.072 INCHES MINIMUM AND 0.087 INCHES MAXIMUM |
| WASHER OUTSIDE DIAMETER | 0.560 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 28 |