Heavy lock nut that can be tightened by hand or with an extension rod. Large contact surface.

| Material | Heat Treat | Finish | DFARS | RoHS |
| 1215 Steel | - | Black Oxide | Yes | Yes |

| A Thread (Inch) | B Diameter (Inch) | C Diameter (Inch) | D (Inch) | E (Inch) | F Diameter (Inch) |
| 1/2-13" | 1-1/8" | 1" | 7/16" | 1/16" | 0.257" |