Precisely align machine parts and prevent movement during assembly. These dowel pins are machined to tight tolerances and have a uniform diameter for a snug fit. They can also be used as a pivot, shaft, or hinge to join moving components. Since dowel pins can be hard to remove, they are best suited for permanent fixtures that don't require frequent adjustments or disassembly.

A second retaining ball gives these pins more holding power than standard ring-grip pins. They resist loosening from vibration but require a strong tug to pull them out. Good for tight spaces, the split ring folds down out of the way when installed, and you can grab it with one finger to remove. Attach a lanyard to keep pins from getting lost, or add tags to identify components.