| BEARING SURFACE TYPE | FLAT |
| COUNTERBORE DIAMETER | 0.210 INCHES MINIMUM AND 0.215 INCHES MAXIMUM NUT |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| NOMINAL THREAD SIZE | 0.190 INCHES |
| NUT COUNTERBORE DEPTH | 0.107 INCHES MINIMUM AND 0.117 INCHES MAXIMUM NUT |
| NUT HEIGHT | 0.245 INCHES MINIMUM |
| WIDTH ACROSS FLATS | 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2401 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |