| BEARING SURFACE FINISH | 125.0 MICROINCHES |
| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| CRITICALITY CODE JUSTIFICATION | ZZZX |
| COUNTERSINK ANGLE | 88.0 DEGREES NOMINAL NUT |
| DEPARTURE FROM CITED DESIGNATOR | MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| MATERIAL | NICKEL ALLOY 400 NUT |
| MATERIAL | PLASTIC POLYHEXAMETHYLENE AMIDE LOCKING INSERT |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| NUT HEIGHT | 0.575 INCHES MINIMUM AND 0.610 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.741 INCHES MINIMUM AND 0.755 INCHES MAXIMUM |
| TEMP RATING | 250.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNF |