Wait, Bevel washer, is it convex in shape Like this --> ) <---
If so I think I remember it now, it went against the tensioner. Sorry, This was 30 days ago and I hadn't had my full cup of coffee yet this morning.
I'll have to remember that name, bevel washer. Bevel washers in my industy are wedge shaped and go on S-Beams to level against the web of the beam.
