| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-N-25027 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD SIZE | 0.625 INCHES |
| NUT STYLE | HEXAGON |
| OVERALL HEIGHT | 0.490 INCHES MINIMUM AND 0.550 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS1291 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OR QQ-P-416 TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 18 |
| THREAD SERIES | UNJF |
| WASHER OUTSIDE DIAMETER | 1.014 INCHES MAXIMUM |
| WASHER THICKNESS | 0.050 INCHES MINIMUM |
| WIDTH ACROSS FLATS | 0.743 INCHES MINIMUM AND 0.755 INCHES MAXIMUM |