| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.3125 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL COMP 601 OR STEEL COMP H11 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6304 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6485 ASSN STD 2ND MATERIAL RESPONSE OR AMS 6487 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 48.0 ROCKWELL C MAXIMUM |
| NUT STYLE | A292 SPLINE DRIVE |
| WASHER OUTSIDE DIAMETER | 0.534 INCHES MAXIMUM |
| OVERALL HEIGHT | 0.312 INCHES MAXIMUM |
| WASHER THICKNESS | 0.034 INCHES MINIMUM |
| DRIVE POINT QUANTITY | 12 |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| COUNTERSINK ANGLE | 85.0 DEGREES MINIMUM WASHER |
| LUBRICATION | SOLUBLE LUBRICANT |
| TEMP RATING | NOT RATED |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS21133-05 |