Norton Nut's Archive of Completed Auctions
New 17T Gearbox Sprocket, Norton, BSA, Ariel, AMC
I don't know what this fits. It looks just like a Norton upright box sprocket but the spline is smaller.
Spline O.D. is 1.198, smaller diameter is 1.087. It suits a 5/8" x 1/4" chain. A new unused part.
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