| HARDNESS RATING | 46.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| OVERALL HEIGHT | 0.406 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD SIZE | 0.375 INCHES |
| NUT STYLE | HEXAGON |
| PRECIOUS MATERIAL AND LOCATION | EXTERNAL SURFACE SILVER |
| WASHER OUTSIDE DIAMETER | 0.579 INCHES MAXIMUM |
| WASHER THICKNESS | 0.070 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.430 INCHES MINIMUM AND 0.440 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2410 ASSN STD 1ST TREATMENT RESPONSE OR AMS 2411 ASSN STD 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | SILVER OVERALL |
| TEMP RATING | 1000.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |