| THREAD SERIES | UNF |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| NUT STYLE | HEXAGON |
| WASHER OUTSIDE DIAMETER | 0.520 INCHES MAXIMUM |
| OVERALL HEIGHT | 0.251 INCHES MINIMUM AND |
| 0.266 INCHES MAXIMUM |
| WASHER THICKNESS | 0.023 INCHES MINIMUM |
| WIDTH ACROSS FLATS | 0.367 INCHES MINIMUM AND |
| 0.378 INCHES MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| TEMP RATING | 450.0 DEG FAHRENHEIT NOMINAL |
| SPECIFICATION/STANDARD DATA | 81205-BACN10YR MANUFACTURERS STANDARD |