"B" Type Sprocket for #40/41 Chain, 5/8" Bore, 8 Tooth

"B" type sprocket for #40/41 chain. Have a hub on one side. Precision hobbed teeth. Case-hardened steel. 5/8" bore. 8 teeth. Has a key as part of the hub rather than a keyway, no key is needed. Has a 5/16-18 set screw.