| THREAD CLASS | 2B |
| NUT STYLE | HEXAGON |
| NUT HEIGHT | 0.180 INCHES MINIMUM AND 0.195 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.4890 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| BEARING SURFACE TYPE | CHAMFERED OR WASHER FACED |
| MATERIAL | COPPER ALLOY OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-611-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| NONDEFINITIVE SPEC/STD DATA | A TYPE |
| DEPARTURE FROM CITED DOCUMENT | AS MODIFIED BY HEIGHT RQMT |