| COUNTERBORE DIAMETER | 0.291 INCHES MAXIMUM NUT |
| FEATURES PROVIDED | FLOATING NUT |
| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| MATERIAL DOCUMENT AND CLASSIFICATION | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4340 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT DIAMETER | 0.525 INCHES MINIMUM AND 0.528 INCHES MAXIMUM |
| NUT COUNTERBORE DEPTH | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM NUT |
| NUT LENGTH | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM |
| NUT HEIGHT | 0.406 INCHES MAXIMUM |
| NUT STYLE | FLOATING SELF-LOCKING BARREL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| TEMP RATING | -65.0 FAHRENHEIT MINIMUM AND 450.0 FAHRENHEIT MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 28 |