| HARDNESS RATING | 70.0 ROCKWELL B MINIMUM AND 125.0 ROCKWELL B MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| LUBRICATION | DRY FILM LUBRICANT |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT DIAMETER | 0.379 INCHES MINIMUM AND 0.389 INCHES MAXIMUM |
| NUT HEIGHT | 0.180 INCHES NOMINAL |
| NUT STYLE | CLINCH |
| SPECIAL FEATURES | 300 SERIES SST |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | MINIATURE SELF-CLINCHING FASTENER |
| PILOT DIAMETER | 0.338 INCHES MINIMUM AND 0.343 INCHES MAXIMUM |
| PILOT LENGTH | 0.060 INCHES MAXIMUM |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |