Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
I only know that because at age 10 or so, my dad taught me how to repair these electric shears we used at his textile mill. The actual motor had one of those type washers on top and one on bottom. I was also put in charge of spare parts inventory.
I just did a quick google search and although "undulated washer" brought up similar photos, "spring washer" also brought up more...
I haven't been able to find any with the same style as the OEM that have a straight edge on part of it. If i buy the round ones, I will have to find a way of slicing off part of it.