| HARDNESS RATING | 179.0 BRINELL STANDARD MINIMUM AND 255.0 BRINELL STANDARD MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | BS S92 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE NUT |
| MATERIAL | STEEL WASHER |
| MATERIAL | STEEL NUT |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| NUT HEIGHT | 0.285 INCHES MINIMUM AND 0.315 INCHES MAXIMUM |
| NUT STYLE | RECESSED |
| OVERALL HEIGHT | 1.198 INCHES NOMINAL |
| SPECIAL FEATURES | 2 LOCKING HOLES 0.062 IN. DIA ACROSS ADJOINING FLATS |
| WASHER OUTSIDE DIAMETER | 1.735 INCHES MINIMUM AND 1.765 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM |
| SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNJF |