Home Products agricultural chain weld on sprockets sprockets w series 62 and 620 chain 62 and 620 chain Use with W series hubs only. 2 Available Products SALE 6206W - Weld-On Sprocket 6 tooth, for 62 and 620 chain. 3.875" O.D., 1.625" I.D. ... SALE 6207W - Weld-On Sprocket 7 tooth, for 62 and 620 chain. 4.375" O.D., 1.625" I.D. ... 2 Available Products