| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| COUNTERBORE DIAMETER | 0.450 INCHES MINIMUM AND 0.460 INCHES MAXIMUM NUT |
| OVERALL HEIGHT | 0.442 INCHES MINIMUM AND 0.482 INCHES MAXIMUM |
| NOMINAL THREAD SIZE | 0.375 INCHES |
| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| MATERIAL | ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 WASHER |
| MATERIAL | PLASTIC NYLON LOCKING INSERT |
| MATERIAL | STEEL COMP 1137 OR STEEL COMP 11L37 OR STEEL COMP 8740 NUT |
| 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 |