About Cornerstone Supply Co.

Who we are

Based in Ohio, Cornerstone Supply Company LLC is a trusted supplier of residential and commercial appliance and HVAC components. We specialize in sourcing OEM parts, high-demand components, and value-tier marketplace solutions — connecting quality manufacturer surplus with the contractors, technicians, and homeowners who need it.

How we work

Every item in our inventory is thoroughly inspected, accurately graded, and backed by fast shipping and dependable service. By giving manufacturer overstock a second life, we keep usable parts out of the landfill and pass real savings on to you.

Why buy from us

• Accurate listings — real part numbers, honest condition grading, and clear photos.
• Fast shipping — most orders leave our Ohio facility within 1–2 business days.
• Real value — competitive pricing on quality OEM and surplus components.
• Dependable support — a real team you can reach by phone or email.

Get in touch

Have a question or looking for a specific part? Contact us — we're happy to help.