Looked at a few other examples but nothing I found that I could change to suit so made my own. 

Onshape users can copy and alter as you wish. To view click HERE Have updated design and is now Parametric.

The bolt was required to hold a sliding shelf back on which the 3d printer sits, inside a cupboard.  The bolt grip and hole it fits into have a 0.1mm variance and with the print setting below no glue was required. This can be altered as a parametric setting on the original file if needed. 

Printed with Prusament. .2 quality setting 20% fill on a Prusa.  

09/09/23. Added Step files. 
25/09/23. Added an Inline bolt Lock