Summary This is a captive nut I made that drops into the Makerslide for attaching things to the frame without drilling holes in the extrusion. The centre hole is for tapping 3mm thread. Drops into the 6mm grove then turns to lock into the extrusion slot. At the moment I am working on cable trays and a cable chain that I made these nuts for, so as I finish each part will put links here so you can get them also