Park-Ohio Holdings Corp. provides supply chain management outsourcing services, capital equipment, and manufactured components across the United States, Europe, Asia, Mexico, Canada, and other international markets. It operates through three segments: Supply Technologies, Assembly Components, and Engineered Products. The Supply Technologies segment offers Total Supply Management, covering production parts and materials supply, engineering and design support, cost analysis, supplier selection, quality assurance, bar coding, packaging and tracking, just-in-time delivery, electronic billing, and technical support, along with production components such as valves, fuel hose assemblies, fasteners, and wheel hardware under the SPAC brand. The Assembly Components segment supplies high-pressure fuel injection rails and pipes, fuel filler pipes, plastic and rubber assemblies, turbo charging and coolant hoses, and value-added design engineering, machining, and parts assembly services. The Engineered Products segment provides field services, induction heating and melting systems, pipe threading systems, and forged and machined products for metals, silicon, coatings, forging, foundry, automotive, and construction equipment industries, and also engineers and installs mechanical forging presses, sells spare parts and crankshafts and camshafts for locomotives, and forges aerospace and defense structural components including landing gears, struts, and railcar center plate and draft lug products. Founded in 1907, the company is headquartered in Cleveland, Ohio.