Originally Posted By: Shotgunjones
That half moon (for lack of a better name) clip is easily lost.


That type key is properly called a Woodruff key. Wonderful little things that are most often used on tapered shafts and mating hubs. Not sure why Benelli would have used one, not being a Benelli owner. Because of their design they do, however, make assembly of some mating parts much easier, as the design allows for the key to be "tipped down" on the end accepting the hub or other part, then rotate into perfect alignment as the part is pressed onto the shaft fully.

And, thanks for the clarification, OC. Well done. It was the "free" part that seemed odd. Best to you.

SRH

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