| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNC |
| COUNTERBORE DIAMETER | 0.374 INCHES MINIMUM AND 0.377 INCHES MAXIMUM NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A581 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 203EZ OR STEEL COMP 303 OR STEEL COMP 303PB OR STEEL COMP 303SE OR STEEL COMP 303 PLUS X OR STEEL COMP 416 OR STEEL COMP 416 PLUS X OR STEEL COMP 416SE OR STEEL COMP 430F OR STEEL COMP 430FSE OVERALL |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| PILOT DIAMETER | 0.430 INCHES MINIMUM AND 0.433 INCHES MAXIMUM |
| PILOT LENGTH | 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT COUNTERBORE DEPTH | 0.428 INCHES MINIMUM AND 0.443 INCHES MAXIMUM NUT |
| NUT DIAMETER | 0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM |
| NUT HEIGHT | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM |
| NUT STYLE | CLINCH |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |