| EXTERNAL SCREW THREAD SERIES DESIGNATOR | NPTF |
| EXTERNAL THREAD SIZE | 0.25-18 |
| EXTERNAL THREAD DIRECTION | RIGHT-HAND |
| INTERNAL SCREW THREAD SERIES DESIGNATOR | NPTF |
| INTERNAL THREAD DIRECTION | RIGHT-HAND |
| INTERNAL THREAD SIZE | 0.125-27 |
| MATERIAL | STEEL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | REDUCER BUSHING |
| NONDEFINITIVE SPEC/STD DATA | 42 FIGURE |
| SPECIFICATION/STANDARD DATA | 0U583-SAE J514 NATIONAL STD/SPEC |
| STYLE DESIGNATOR | OUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL) |