| COUNTERBORE DIAMETER | 0.401 INCHES MINIMUM AND 0.411 INCHES MAXIMUM NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A555 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A581 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL UNS S21800 OR STEEL COMP 203EZ OR STEEL COMP 303 OR STEEL COMP 303 PLUS X OR STEEL COMP 303MA OR STEEL COMP 303PB OR STEEL COMP 303SE OR STEEL COMP 416 OR STEEL COMP 416 PLUS X OR STEEL COMP 416SE OR STEEL COMP 430F OR STEEL COMP 430FSE OVERALL |
| NOMINAL THREAD SIZE | 0.375 INCHES |
| NUT COUNTERBORE DEPTH | 0.433 INCHES MINIMUM AND 0.443 INCHES MAXIMUM NUT |
| NUT DIAMETER | 0.872 INCHES MINIMUM AND 0.878 INCHES MAXIMUM |
| NUT HEIGHT | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM |
| NUT STYLE | SPLINE |
| PILOT DIAMETER | 0.479 INCHES MINIMUM AND 0.482 INCHES MAXIMUM |
| PILOT LENGTH | 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNC |
| THREAD QUANTITY PER INCH | 16 |