| HOLE CONFIGURATION STYLE | CONFIGURATION B |
| HOLE TYPE AND QUANTITY | 2 DRILLED |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| NUT HEIGHT | 0.328 INCHES MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AISI NATIONAL SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 4130 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 4340 OVERALL OR STEEL COMP 8740 OVERALL |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 20 |
| WIDTH ACROSS FLATS | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 81349-MIL-N-25027 GOVERNMENT SPECIFICATION |
| SUPPLEMENTARY FEATURES | SHEAR THIN HEIGHT DESIGN |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| TEMP RATING | 450.0 DEG FAHRENHEIT MAXIMUM |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3B |
| DRILLED HOLE DIAMETER | 0.037 INCHES MINIMUM AND 0.057 INCHES MAXIMUM |
| BEARING SURFACE TYPE | FLAT |
| HARDNESS RATING | 44.0 ROCKWELL C MAXIMUM |