SummaryThere were already a lot of shelf pins on Thingiverse, but I wanted something beefier. It is for a 4.7 mm (0.185 in) peg hole that is 11 mm deep. It includes an optional mounting point for a wood screw - and the steel variants will allow you to use a 15 mm M3 SHCS to take most of the load of the shelf. I have no liability for however you may use this design, you should not expect any guarantee of structural adequacy regardless of application.InstructionsWhen I printed it the 'sleeve' for the steel peg was not fully attached to the bolt - but it did not matter because it threaded over it just fine. I have no particular recommendations for the print settings.