Hi, I have a full metal bracket speaker mounts that I have had for quite some time holding up my M22s. I recently lost the black, dome headed, square body, blind, carriage nut that comes with one of them when painting the house.

Can anyone advise on where I could find a replacement nut? I have been searching hardware suppliers but can find this nut anywhere.

I guess I could just replace with a longer fastener, washer and nut, but it's just not the same.

Many thanks. Shawn