Battery Screw Bracket Snapped

[bd3500]

Unfortunate luck..

My Battery was dead and needed replaced so I went to AutoZone and got one, install went without a hitch, however when I was tightening the nut on the negative terminal post, the screw portion snapped in half.

The bottom part appears to be a mini-metal bracket that pushes the clamp together to make a good connection on the post. AutoZone did not have these. Does anyone know what they are called and/or where I can find one?

Right now I used a wing nut upside down that seemed to do the trick, but i'm uneasy about it.

Thanks!