I need to buy replacement bolt-and-nut fixings for a self-assembly bed. The trouble is that I can't find the proper name for the type of fixing. I had thought it was called a barrel fixing, but this doesn't seem to be what hardware websites call it!
The fixing consists of a brassed bolt with flat head (to take allen key), and a cylindrical nut (with the hole running across the diameter). There is a slot across one of the flat ends, parallel to the hole. My specimen has the bolt 75mm long, with what I suspect is an M5 thread. The cylindrical nut is 10mm diameter x 18mm long, with the hole 10mm from one end.
The bolt part of the fixing is inserted through a hole in the vertical bed support, and the cylindrical nut goes into a hole in the cross-rail. The slot on the nut is used to orientate the nut to accept the bolt.
If the descrition isn't helpful, there is a photo at
Many Thanks
John Geddes Derbyshire