| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| COUNTERBORE DIAMETER | 0.519 INCHES MINIMUM AND 0.529 INCHES MAXIMUM NUT |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| OVERALL HEIGHT | 0.473 INCHES MINIMUM AND 0.513 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5024 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5020 ASSN STD 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 3RD MATERIAL RESPONSE OR AMS 6323 ASSN STD 3RD MATERIAL RESPONSE OR AMS 6325 ASSN STD 3RD MATERIAL RESPONSE OR AMS 6327 ASSN STD 3RD MATERIAL RESPONSE OR AMS 6358 ASSN STD 3RD MATERIAL RESPONSE NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-225/6,T4 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-250/13,T6 FED SPEC 2ND MATERIAL RESPONSE WASHER |
| MATERIAL | PLASTIC NYLON LOCKING INSERT |
| MATERIAL | STEEL COMP 1137 OR STEEL COMP 11L37 OR STEEL COMP 8740 NUT |
| NOMINAL THREAD SIZE | 0.438 INCHES |
| NUT COUNTERBORE DEPTH | 0.249 INCHES MINIMUM AND 0.269 INCHES MAXIMUM NUT |
| NUT STYLE | FLAT WITH TURNED BACK EDGE |
| WASHER OUTSIDE DIAMETER | 0.755 INCHES MINIMUM AND 0.785 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.616 INCHES MINIMUM AND 0.627 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE WASHER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE NUT |
| SURFACE TREATMENT | CADMIUM AND CHROMATE NUT |
| SURFACE TREATMENT | CHROMATE WASHER |
| TEMP RATING | 250.0 FAHRENHEIT MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNJF |