A model of a wooden dowel pin used for joinery. It consists of a core cylinder, 2 end caps and ribs down the length of the core.
Not sure how useful this is. One the one hand, it's very customizable vs. what you would in a hardware store. On the other hand, I don't think wood glue will penetrate the way it does with real wood.
I used OpenSCAD to put the cylinders together and runs the ribs around the core using a little trig.