| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| COUNTERBORE DIAMETER | 1.427 INCHES MINIMUM AND 1.467 INCHES MAXIMUM FIRST END |
| COUNTERSINK ANGLE | 88.0 DEGREES MINIMUM SECOND END |
| CRITICALITY CODE JUSTIFICATION | ZZZY |
| LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-N-25027/1 MIL SPEC SINGLE MATERIAL RESPONSE AND -25027/1-22C MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-N-25027 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | NICKEL ALLOY OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT,SLFLKG,HVY HEX |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 1.375 INCHES |
| NUT HEIGHT | 1.547 INCHES MINIMUM AND 1.609 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | 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 |
| WIDTH ACROSS FLATS | 1.973 INCHES MINIMUM AND 2.011 INCHES MAXIMUM |
| TEMP RATING | 250.0 DEG FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 6 |