| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | SILVER OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2411 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 29.0 ROCKWELL C MINIMUM AND |
| 48.0 ROCKWELL C MAXIMUM |
| NUT STYLE | HEXAGON |
| WASHER OUTSIDE DIAMETER | 0.525 INCHES NOMINAL |
| OVERALL HEIGHT | 0.360 INCHES MAXIMUM |
| WASHER THICKNESS | 0.040 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.372 INCHES NOMINAL |
| PRECIOUS MATERIAL | SILVER |
| PRECIOUS MATERIAL AND LOCATION | OVERALL SILVER |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 77445 |
| MFR SOURCE CONTROLLING REFERENCE | ST1073-11 |