wrote in message
...
They ARE tapered shaft adapters - any (well - MANY, anyways - of the
"square plate" type steel blade adapters use the shear rivets. Some
of the die-cast adapters also used the shear rivets.
Look for DOP65-200LB on
http://www.discountonlineparts.com/l...ade%20Adapters



That is the one I remember seeing, but never saw any rivits in any of them.
There are two punched holes that are raised to drive the blade.
Greg