| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | 8 SPLINE TAMPER PROOF, LOCK NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS-QQ-A-225/9 NATIONAL STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | ALUMINUM ALLOY 7075 OVERALL |
| NOMINAL THREAD SIZE | 0.3750 INCHES |
| SPECIAL FEATURES | ITEM IS 8 SPLINE HEAD AND DARK BLUE DYE |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625, TYPE II, CLASS 2, MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ANODIZE OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |