| FEMALE END CHARACTERISTIC | COUNTERSUNK |
| FEMALE END SCREW THREAD SERIES DESIGNATOR | UNF |
| FEMALE END THREAD CLASS | 2B |
| FEMALE END THREAD DIRECTION | RIGHT-HAND |
| FEMALE END THREAD SIZE | 0.500 IN.-20 |
| MALE END SCREW THREAD SERIES DESIGNATOR | UNEF |
| MALE END THREAD CLASS | 2A |
| MALE END THREAD DIRECTION | RIGHT-HAND |
| MALE END THREAD LENGTH | 0.360 INCHES NOMINAL |
| MALE END THREAD SIZE | 0.875 IN.-20 |
| MATERIAL | ALUMINUM ALLOY |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT - BRIDLE LOCK |
| OVERALL LENGTH | 0.601 INCHES MINIMUM AND 0.611 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.620 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| WRENCHING FACILITY SHAPE | HEXAGON |