SPROCKET – “B” TYPE, STEEL, #219 CHAIN, 3/4″ BORE, 3/16″ INTEGRAL KEY, 5/16-18 SET SCREW, 12 TOOTH
Made of case-hardened steel and hobbed teeth, “B” Type Sprockets have a hub on one side only. Unless otherwise noted, “B” type sprockets have two 5/16-18 set screws. All sprockets on this page with a “K” in their part number have a key broached into the hub rather than a keyway. No key is needed.