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Taper Lock 2517 BSW Bushed Metric Sprocket
For ISO 12B-3 Roller Chain
21 Teeth
136 mm Outside Diameter(de)
127.82 mm Pitch Diameter(dp)
mm Hub Diameter(dm)
49.8 mm Width(A)
49.8 mm Teeth Width(B3)
Material C1045 Steel Form 5, 1/2inchx12 tpi BSW Threads