| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| CRITICALITY CODE JUSTIFICATION | FEAT |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| MATERIAL | STEEL COMP 8740 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1021 OR STEEL COMP 1030 OR STEEL COMP 1117 OR STEEL COMP 1118 OR STEEL COMP 1137 OR STEEL COMP 1213 OVERALL |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| NUT HEIGHT | 0.575 INCHES MINIMUM AND 0.610 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| SPECIAL FEATURES | SAFETY CRITICAL THREAD PER FED STD H28/20 SYSTEM 22 |
| WIDTH ACROSS FLATS | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TY2 CL2 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 | 20 |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |