| COUNTERSINK ANGLE | 60.0 DEGREES NOMINAL WASHER |
| LOCKING FEATURE | FREE-RUNNING ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL EXCEPT THREADS |
| MATERIAL | IRON ALLOY 660 OVERALL EXCEPT THREADS |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT,HEX,FLANGED,SELF-LOCKING |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.3125 INCHES |
| NUT STYLE | HEXAGON |
| OVERALL HEIGHT | 0.312 INCHES NOMINAL |
| WASHER OUTSIDE DIAMETER | 0.482 INCHES NOMINAL |
| WASHER THICKNESS | 0.030 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.367 INCHES MINIMUM AND 0.378 INCHES MAXIMUM |
| SURFACE TREATMENT | CADMIUM OVERALL EXCEPT THREADS |
| SURFACE TREATMENT | COPPER THREADS |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES | UNJF |
| COUNTERBORE DIAMETER | 0.342 INCHES NOMINAL WASHER |