| BASE THICKNESS | 0.050 INCHES MINIMUM AND 0.064 INCHES MAXIMUM |
| BASE WIDTH | 0.475 INCHES MINIMUM AND 0.485 INCHES MAXIMUM |
| COUNTERBORE DIAMETER | 0.317 INCHES MINIMUM AND 0.329 INCHES MAXIMUM NUT |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| NUT COUNTERBORE DEPTH | 0.100 INCHES MINIMUM NUT |
| NUT HEIGHT | 0.332 INCHES MINIMUM AND 0.382 INCHES MAXIMUM |
| NUT STYLE | GANG CHANNEL, SELF LOCKING |
| NUT LENGTH | 0.722 INCHES MINIMUM AND 0.732 INCHES MAXIMUM |
| SURFACE TREATMENT | NICKEL OR NICKEL AND COPPER OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3B |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 24 |