Mounting Bolts hex-head for Underware/Multiboard

Sometimes a bolt is the easiest way to attach anything with a 7mm or larger hole to the multiboard. These were created by reverse engineering the multiboard thread (done by David D https://www.printables.com/model/709777-multiboard-screwbolt-step-files-for-modeling-and-d) . They fit better than the official T-bolts from multiboard, as the clearance is smaller. The heads can be screwed with a ½ socket wrench or by hand. There are two variants: one with a hole (for an M3 screw). The hole by itself provides additional strength to the bolt, but you can use a screw through is you really want to attach something very heavy (in my tests, the ones with the holes can hold 5 kg easily, I have not tested the ones without). If you are concerned about their strength, I have also uploaded a split version: https://makerworld.com/en/models/769516#profileId-705168