| BEARING SURFACE TYPE | CHAMFERED |
| COUNTERBORE DIAMETER | 0.409 INCHES MINIMUM AND 0.413 INCHES MAXIMUM OVERALL |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| NUT COUNTERBORE DEPTH | 0.117 INCHES MINIMUM AND 0.127 INCHES MAXIMUM OVERALL |
| NUT HEIGHT | 0.470 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5939 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5697 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5685 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5686 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 304 OR STEEL COMP 305 OR IRON ALLOY 660 OVERALL |
| NOMINAL THREAD SIZE | 0.375 INCHES |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 24 |
| WIDTH ACROSS FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE II, CLASS 2 OR 8 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |