| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| COUNTERBORE DIAMETER | 0.299 INCHES MINIMUM AND 0.309 INCHES MAXIMUM NUT |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| OVERALL HEIGHT | 0.375 INCHES MINIMUM AND 0.405 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 | 0.250 INCHES |
| NUT COUNTERBORE DEPTH | 0.172 INCHES MINIMUM AND 0.192 INCHES MAXIMUM NUT |
| NUT HEIGHT | 0.125 INCHES MINIMUM |
| NUT STYLE | FLAT WITH TURNED BACK EDGE |
| WASHER OUTSIDE DIAMETER | 0.530 INCHES MINIMUM AND 0.560 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 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 | 28 |
| THREAD SERIES | UNJF |