| HARDNESS RATING | 277.0 BRINELL STANDARD MINIMUM AND 363.0 BRINELL STANDARD MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| MATERIAL DOCUMENT AND CLASSIFICATION | DTD 5026 OVERALL AND CORROSION RESISTANT STEEL TO AERONAUTICAL MATERIAL SPECIFIC MIL STD SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| NUT STYLE | DOUBLE HEXAGON |
| OVERALL HEIGHT | 13.92 MILLIMETERS MINIMUM AND 14.43 MILLIMETERS MAXIMUM |
| WASHER OUTSIDE DIAMETER | 19.96 MILLIMETERS NOMINAL |
| WASHER THICKNESS | 2.54 MILLIMETERS MINIMUM AND 3.05 MILLIMETERS MAXIMUM |
| WIDTH ACROSS FLATS | 15.88 MILLIMETERS NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DTD 939 OVERALL MIL STD SINGLE TREATMENT RESPONSE |
| SURFACE TREATMENT | SILVER OVERALL |
| TEMP RATING | 650.0 DEG CELSIUS NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNJF |