| BEARING SURFACE TYPE | FLAT |
| COUNTERBORE DIAMETER | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM OVERALL |
| LOCKING FEATURE | PREVAILING TORQUE WITH METALLIC INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS-QQ-250/11 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | ALUMINUM ALLOY 6061 OVERALL |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | KEYING HEX NUT |
| PROPRIETARY CHARACTERISTICS | PACS |
| NUT COUNTERBORE DEPTH | 0.125 INCHES NOMINAL OVERALL |
| NUT HEIGHT | 0.266 INCHES NOMINAL |
| NUT STYLE | HEXAGON |
| SPECIAL FEATURES | ONE KEY SLOT IN HEX END OF NUT IS 0.030 IN (NOM) WIDE AND 0.030 IN (NOM) DEEP |
| WIDTH ACROSS FLATS | 0.384 INCHES MINIMUM AND 0.388 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625, TYPE 111 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ANODIZE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |