| COUNTERBORE DIAMETER | 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM NUT |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD SIZE | 0.190 INCHES |
| NUT COUNTERBORE DEPTH | 0.065 INCHES MINIMUM AND 0.095 INCHES MAXIMUM NUT |
| NUT HEIGHT | 0.246 INCHES MINIMUM AND 0.273 INCHES MAXIMUM |
| NUT STYLE | CLINCH |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| PILOT DIAMETER | 0.273 INCHES MINIMUM AND 0.277 INCHES MAXIMUM |
| PILOT LENGTH | 0.079 INCHES MINIMUM AND 0.091 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 76301-ST3-405 MANUFACTURERS STANDARD |
| WIDTH ACROSS FLATS | 0.365 INCHES MINIMUM AND 0.377 INCHES MAXIMUM |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| TEMP RATING | 450.0 FAHRENHEIT NOMINAL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 32 |