| MATERIAL | STEEL OVERALL |
| CROSS-SECTIONAL SHAPE | HEXAGON |
| WIDTH ACROSS FLATS | 0.615 INCHES MINIMUM AND |
| 0.627 INCHES MAXIMUM |
| STYLE DESIGNATOR | LEFT INTERNAL AND RIGHT EXTERNAL THREAD |
| LENGTH | 2.625 INCHES NOMINAL |
| RIGHT PROJECTION DIAMETER | 0.4375 INCHES NOMINAL |
| RIGHT PROJECTION LENGTH | 0.875 INCHES NOMINAL |
| HOLE QUANTITY PERPENDICULAR TO AXIS | 3 |
| THREAD SERIES DESIGNATOR | UNF LEFT INTERNAL (INCLUDES THRU THREAD) |
| UNF RIGHT EXTERNAL |
| NOMINAL THREAD SIZE | 0.3125 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) |
| 0.4375 INCHES RIGHT EXTERNAL |
| THREAD QUANTITY PER INCH | 24 LEFT INTERNAL (INCLUDES THRU THREAD) |
| 20 RIGHT EXTERNAL |
| THREAD CLASS | 3B LEFT INTERNAL (INCLUDES THRU THREAD) |
| 3A RIGHT EXTERNAL |
| THREAD DIRECTION | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| RIGHT-HAND RIGHT EXTERNAL |
| THREAD LENGTH | 1.000 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) |
| 0.625 INCHES NOMINAL RIGHT EXTERNAL |