40BS21H X 1 Sprocket - 1/2" Pitch - 21 Teeth - 1" Finished Bore Includes Keyway & 2 Set Screws Hardened Teeth Common Interchanges 40B21F 1 UST
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40BS21H X 1 Sprocket - 1/2" Pitch - 21 Teeth - 1" Finished Bore Includes Keyway & 2 Set Screws Hardened Teeth Common Interchanges 40B21F 1 UST
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