| THREAD SERIES | UNJF |
| NOMINAL THREAD SIZE | 0.3125 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | PLASTIC NYLON LOCKING INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5532 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| QQ-A-225/6,T4 FED SPEC 1ST MATERIAL RESPONSE OR |
| QQ-A-250/13,T6 FED SPEC 2ND MATERIAL RESPONSE WASHER |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE NUT |
| CHROMATE WASHER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE NUT |
| MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE WASHER |
| NUT STYLE | FLAT WITH TURNED BACK EDGE |
| WASHER OUTSIDE DIAMETER | 0.610 INCHES MINIMUM AND |
| 0.640 INCHES MAXIMUM |
| OVERALL HEIGHT | 0.396 INCHES MINIMUM AND |
| 0.436 INCHES MAXIMUM |
| NUT HEIGHT | 0.203 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.492 INCHES MINIMUM AND |
| 0.502 INCHES MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| NUT COUNTERBORE DEPTH | 0.203 INCHES MINIMUM AND |
| 0.223 INCHES MAXIMUM NUT |
| COUNTERBORE DIAMETER | 0.385 INCHES MINIMUM AND |
| 0.395 INCHES MAXIMUM NUT |
| TEMP RATING | 250.0 DEG FAHRENHEIT NOMINAL |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS21224-5C |