| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| COUNTERBORE DIAMETER | 0.332 INCHES MAXIMUM NUT |
| HARDNESS RATING | 42.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| NUT HEIGHT | 0.253 INCHES MAXIMUM |
| NUT STYLE | DOUBLE HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| PRECIOUS MATERIAL AND LOCATION | ALL SURFACES SILVER |
| PRECIOUS MATERIAL | SILVER |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 24 |
| WIDTH ACROSS FLATS | 0.493 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 78286-SS5086 MANUFACTURERS STANDARD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-S-365,TY 1,CL A FED SPEC 1ST TREATMENT RESPONSE OR AMS 2410 ASSN STD 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | SILVER AND CHROMATE AND SILVER OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |