Thread these shafts into a tapped hole to support idler sprockets and pulleys in tensioning applications. They have a retaining-ring groove, retaining ring, and spacers to position your component and hold it in place.

Combine with a machine key to transmit torque to gears, sprockets, and other power transmission components.

Clip retaining rings into the grooves to separate and position gears, sprockets, and bearings.

A flat surface area allows set screws to dig into the shaft for securely mounting gears, sprockets, and bearings.