| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| CROSS-SECTIONAL SHAPE | HEXAGON |
| STYLE DESIGNATOR | LEFT INTERNAL AND RIGHT INTERNAL THREADS |
| WIDTH BETWEEN FLATS | 0.375 INCHES NOMINAL |
| LENGTH | 0.500 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNC LEFT INTERNAL (INCLUDES THRU THREAD) |
| UNC RIGHT INTERNAL |
| NOMINAL THREAD SIZE | 0.138 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) |
| 0.138 INCHES RIGHT INTERNAL |
| THREAD QUANTITY PER INCH | 32 LEFT INTERNAL (INCLUDES THRU THREAD) |
| 32 RIGHT INTERNAL |
| THREAD DIRECTION | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| RIGHT-HAND RIGHT INTERNAL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | FEMALE STANDOFF |