Belleville Washers

Hi all,

Rebuilding the rear beam at the moment and I've seen on the exploded views that the stub axle bolts use belleville washers? Never heard of these before but found the ones I need online and purchased them.

Just wanted to know if these are the best choice to use? Or if people use a normal washer and spring washer?

Thanks 

http://ecmweb.com/content/how-use-belleville-washers-correctly