| THREAD SERIES | UNF |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE LOCKING INSERT |
| STEEL COMP 303 OVERALL EXCEPT INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-M-20693,COMP A,TY 2 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING INSERT |
| AISI GRADE 303 ASSN STD SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT | PASSIVATE OVERALL EXCEPT INSERT |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| NUT STYLE | CLINCH |
| PILOT DIAMETER | 0.349 INCHES MINIMUM AND |
| 0.352 INCHES MAXIMUM |
| PILOT LENGTH | 0.085 INCHES NOMINAL |
| NUT HEIGHT | 0.398 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.428 INCHES MINIMUM AND |
| 0.448 INCHES MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| NUT COUNTERBORE DEPTH | 0.080 INCHES NOMINAL FIRST END |
| COUNTERBORE DIAMETER | 0.280 INCHES NOMINAL FIRST END |
| TEMP RATING | 250.0 DEG FAHRENHEIT MAXIMUM |