| BARREL HEIGHT | 0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM |
| COUNTERBORE DIAMETER | 0.271 INCHES MINIMUM AND 0.281 INCHES MAXIMUM NUT |
| FEATURES PROVIDED | FLOATING NUT |
| HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 41.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| NUT COUNTERBORE DEPTH | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM NUT |
| NUT DIAMETER | 0.525 INCHES MINIMUM AND 0.528 INCHES MAXIMUM |
| NUT LENGTH | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM |
| NUT HEIGHT | 0.406 INCHES MINIMUM |
| NUT STYLE | FLOATING SELF-LOCKING BARREL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SPECIFICATION/STANDARD DATA | 80205-NAS577 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 28 |