This is a Du-Bro 1/4-28 Aluminum Spinner Prop Nut.
DuBro 4 Pin Spinner (Red) (2-1/2") [DUB286]
DuBro 4 Pin Spinner (White) (2-1/4") [DUB278] T13
DuBro 4 Pin Spinner (Black) (2-1/4") [DUB279]
DuBro 4 Pin Spinner (White) (2-1/4") [DUB278]
DuBro 4 Pin Spinner (Black) (2-1/2") [DUB285]
DuBro 4 Pin Spinner (Yellow) (2") [DUB275]
