Weld-A-Sprocket for #40 Chain 1/2" Pitch 21 Teeth X-Series with 2" Bore
Sprocket weld able # 40 chain 21 tooth x-series
carbon steel with heat treated teeth.
Fits x-series hubs
replaces:00104021, 0066091-384, 20004021, 72161764, 971-20004021, wss104021