This is a snap-in mounting block designed for mounting Wago 221-2401 inline splicing connectors.
It does not include any extra holes or other features for mounting. It is recommended that you import the STEP into your CAD software of choice to add mounting features suitable to your application.
Rated to 2k+ rpm, but only if wrapped in safety wire.
An Onshape document with this geometry is located here.
The author hasn't provided the model origin yet.