| DISTANCE ACROSS FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
| OVERALL LENGTH | 2.030 INCHES NOMINAL |
| MATERIAL | STEEL |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| NUT END SHANK DIAMETER | 0.251 INCHES MINIMUM AND 0.254 INCHES MAXIMUM |
| NUT END SHANK LENGTH | 0.700 INCHES MINIMUM AND 0.760 INCHES MAXIMUM |
| SHOULDER LENGTH | 0.175 INCHES NOMINAL |
| STUD END SHANK DIAMETER | 0.251 INCHES MINIMUM AND 0.254 INCHES MAXIMUM |
| STUD END SHANK LENGTH | 0.120 INCHES MINIMUM AND 0.180 INCHES MAXIMUM |
| STYLE DESIGNATOR | SHOULDERED |
| THREAD CLASS | 3A LOCATION NOT OTHERWISE SPECIFIED |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD LENGTH | 0.520 INCHES MINIMUM AND 0.570 INCHES MAXIMUM NUT THREAD |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) NUT THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |