| COUNTERBORE DIAMETER | 0.385 INCHES MINIMUM AND 0.390 INCHES MAXIMUM NUT |
| HEAD HEIGHT | 0.025 INCHES MINIMUM AND 0.035 INCHES MAXIMUM |
| HEAD DIAMETER | 0.520 INCHES MAXIMUM |
| HEAD PILOT DIAMETER | 0.489 INCHES MINIMUM AND 0.491 INCHES MAXIMUM |
| HEAD STYLE | SERRATED WITH PILOT |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | SOLUBLE LUBRICANT |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| NUT COUNTERBORE DEPTH | 0.572 INCHES NOMINAL NUT |
| NUT GRIP RANGE | +0.360 TO 0.400 INCHES |
| NUT DIAMETER | 0.489 INCHES MINIMUM AND 0.491 INCHES MAXIMUM |
| NUT LENGTH | 1.400 INCHES MINIMUM AND 1.410 INCHES MAXIMUM |
| NUT STYLE | BLIND RIVET W/SMOOTH ROUND SHANK |
| SHANK END TYPE | CLOSED |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES | UNJF |