| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| PRECIOUS MATERIAL AND LOCATION | NUT SILVER |
| PRECIOUS MATERIAL | SILVER |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT STYLE | DOUBLE HEXAGON |
| OVERALL HEIGHT | 0.401 INCHES MINIMUM AND 0.409 INCHES MAXIMUM |
| WASHER OUTSIDE DIAMETER | 0.430 INCHES MINIMUM AND 0.445 INCHES MAXIMUM |
| WASHER THICKNESS | 0.062 INCHES MINIMUM AND 0.078 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.370 INCHES MINIMUM AND 0.373 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | BPS 513 CAGEC 27238 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | SILVER OVERALL |
| TEMP RATING | 1200.0 DEG FAHRENHEIT MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES | UNJF |