| BASE THICKNESS | 0.050 INCHES MINIMUM AND 0.065 INCHES MAXIMUM |
| BASE WIDTH | 0.419 INCHES MINIMUM AND 0.429 INCHES MAXIMUM |
| COUNTERBORE DIAMETER | 0.254 INCHES MINIMUM AND 0.274 INCHES MAXIMUM NUT |
| LOCKING FEATURE | FREE-RUNNING ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT COUNTERBORE DEPTH | 0.038 INCHES MINIMUM AND 0.048 INCHES MAXIMUM NUT |
| NUT HEIGHT | 0.225 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| NUT STYLE | GANG CHANNEL, SELF LOCKING |
| NUT LENGTH | 0.531 INCHES MINIMUM AND 0.600 INCHES MAXIMUM |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3B |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 28 |