| COUNTERBORE DIAMETER | 0.137 INCHES MINIMUM AND 0.143 INCHES MAXIMUM FIRST END |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-626,1/4 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY 353 OVERALL |
| NOMINAL THREAD SIZE | 0.112 INCHES |
| NUT DIAMETER | 0.250 INCHES NOMINAL |
| NUT COUNTERBORE DEPTH | 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM FIRST END |
| NUT HEIGHT | 0.215 INCHES MINIMUM AND 0.235 INCHES MAXIMUM |
| NUT STYLE | SPLINE |
| PILOT DIAMETER | 0.159 INCHES MINIMUM AND 0.165 INCHES MAXIMUM |
| PILOT LENGTH | 0.095 INCHES MINIMUM AND 0.105 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | STD F-207,FSCM 80009 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | COPPER AND TIN AND ZINC OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 40 |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |