What are these called?
I think they are called, "Tube Holder Grabby Things". LOL Just kidding.
I think you mean these. They are called Internal tooth starlock washers.
Amazon.com: Hilitchi 600-Pcs [7-Size] Internal Tooth Starlock Washers Assortment Kit, Quick Speed Locking Washers, Black Oxide Finish : Industrial & Scientific
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