General-purpose threaded inserts with a thick, heavy-duty thread wall, suitable for most applications. Key Inserts are ideal for thread reinforcement, especially when the mating stud or bolt will be removed frequently. They provide strong, permanent steel threads in almost any parent material – ferrous, non-ferrous, or non-metallic. Key Inserts are also well suited for quick repair of stripped, damaged, or worn threads. Locking keys positively prevent the insert from rotating.

This feature uses a modified internal thread to prevent the installed bolt or stud from rotating. This feature is useful for one-time, permanent installations.
| Item | Material | Heat Treat | Finish | RoHS |
| Body | 303 Stainless Steel | - | - | ✔ |
| Keys | 302 Stainless Steel | - | - | ✔ |

| Internal Thread | External Thread(inch) | Length(inch) | Shear Engagement Area (sq In) |
| #10-24 | 3/8-16 inch | 0.31 inch | 0.190 sq in |