| COUNTERBORE DIAMETER | 0.625 INCHES MINIMUM AND 0.660 INCHES MAXIMUM NUT |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| OVERALL HEIGHT | 0.625 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6304 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6487 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 601 OR STEEL COMP H11 OVERALL |
| NOMINAL THREAD SIZE | 0.625 INCHES |
| NUT STYLE | DOUBLE HEXAGON |
| SPECIFICATION/STANDARD DATA | 80205-NAS1804 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| WASHER OUTSIDE DIAMETER | 1.024 INCHES MAXIMUM |
| WASHER THICKNESS | 0.084 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT MAXIMUM |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3B |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 18 |