are the most popular locking device for renewable drill bushings. Use on either the "slip" side or the "fixed" side of a slip/fixed renewable bushing. Lockscrews are simple, strong, compact, and economical.

| Material | Heat Treat | Finish | DFARS | RoHS | |
| Mild Steel | - | Black Oxide | โ | โ |
| A (Inch) | B Diameter (Inch) | C Diameter (Inch) | E (Inch) | F (Inch) | Thread (Inch) |
| 5/8" | 3/8" | 5/8" | 1/4" | 0.138 / .132" | 5/16-18" |