Sprocket - A Plate - 1/2" Pitch - 20 Teeth - 5/8" Bore Hardened Teeth Common Interchanges Click For More Information 41A20 X 5/8Sprocket - A Plate - 1/2" Pitch - 20 Teeth - 5/8" Bore Hardened Teeth Common Interchanges Click For More Information 41A20 X 5/8