Hi - first post here. I want to make a portable sketching easel and I'm looking for a fitting but I have no idea how to search for it! I want to join 2 hardwood slats such that they can be folded together for compactness but which open out and can be screwed down be very sturdy. Its the actual screw fitting that I'm looking for. So in one part there is a piece which I believe is called a 'T nut'. This is the 'female' part which is internally threaded. In the other piece there is a bolt with a wing nut which is 'captured' so that it can't fall out and which fits into the T nut in the first piece. I hope that makes sense. If I can figure out how to do it I'll attach and image which will make things much clearer. Thanks for your help!