| THREAD SERIES | UNF |
| NOMINAL THREAD SIZE | 0.438 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2024 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-225/4 TEMPER T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-225/6 TEMPER T6 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/6 TEMPER T851 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ANODIZE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| NUT HEIGHT | 0.250 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.684 INCHES MINIMUM AND 0.691 INCHES MAXIMUM |
| NOMINAL TUBE OUTSIDE DIAMETER | 0.250 INCHES |
| SPECIAL FEATURES | COLOR BLUE |