Park-Ohio Holdings is driven to look for trouble. The holding company, operating through Park-Ohio Industries and its subsidiaries, troubleshoots industrial supply chain logistics issues and makes a slew of fasteners and other industrial components. The company straddles three business segments: Supply Technologies sources and procures production components for OEMs in industries ranging from automotive to aerospace; Manufactured Products produces specialized systems and parts used in such industrial applications as coatings, forging, oil and gas, and rail; and the Aluminum Products unit casts and machines metal parts -- knuckles, oil pans, cylinders -- used by auto, agricultural, construction, and marine OEMs.