| DISTANCE FROM CENTERLINE TO FLAT | 0.216 INCHES MINIMUM AND 0.222 INCHES MAXIMUM |
| BEARING SURFACE TYPE | FLAT |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM |
| NUT HEIGHT | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM |
| NUT STYLE | NUT PLAIN PENTAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5659 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP XM-12 OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNJF |
| THREAD QUANTITY PER INCH | 28 |