Commercial Steel Doors, Frames & Hardware — Wholesale Pricing | MDI Supply

Markets We Serve

In stock and special order commercial doors, frames, hardware, access doors and accessories. Accurate lead-times, reliable nationwide shipping  and Division 8 technical support since 1972 - all make MDI a favorite among its customers.

  • Contractors
  • Trade Professionals
  • Building Supply
  • Door Installers
  • Facility Management
  • Mix-use
  • Multi-family
  • Education
  • Healthcare FacilitiesHospitality
  • Retail
  • Government
Commercial Steel Doors, Frames & Hardware — Wholesale Pricing
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MDI Commercial Doors, Frames & Hardware Best Sellers and Featured Items

MDI Supply is an American online company that sells commercial grade doors,frames, hardware, accessories, access doors & much more at wholesale pricing - we do not sell Retail. Our products ship from various warehouses strategically located across the USA to provide fast delivery to our customers.

When it comes to Division 8 door hardware, choosing the right commercial door hardware is not easy, but we are here to help you make a better buying decision to fit your specific application.  If you have any questions at all, please don't hesitate to contact one of our sales reps toll free at: 888-634-3667.

Professional service, quality and reliability are the components and commitment that make up the foundation that MDI®is built on. Build better spaces with MDIsupply.com.

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Why Buy from MDIsupply.com?

  • Selling Online Since 1999

    MDI Supply has been selling commercial doors, frames, hardware, access doors and accessories online since 2009 and has been in business since 1972. MDI is back by a staff that has well over 100 years of combined experience with Divison 8 doors, frames & hardware and Division 10 access doors and washroom accessories. 

  • UL & Intertek Certified

    MDI is licensed by UL and Intertek Testing for fire labeled doors/frames. We can label our doors/frames 20, 45, 90 min when needed and we can also fire label our HM doors/frames 3 hours when certain conditions apply. MDI adheres to the principals and practices of DHI-Door & Hardware Institute, NAAMM-National Asscociation of Architectural Metal Manufacturers and SDI-Steel Door Insitute. Contact MDI for more information.

  • Nationwide Delivery & No Minimums

    We offer nationwide delivery with products stocked in strategically located warehouses across the USA for fast delivery. Plus there is no minimum purchase required at www.MDIsupply.com. You can buy one door or frame, one set of hinges, one lock - whatever you need to complete your project. Or you can call MDI in th ebeginning and we can quote your project of doors, frames & hardware.

  • Do you have a Custom Application?

    MDI has a fully stock warehouse of commercial doors, frames, hardware and access doors plus we can perform in-house custom door & frame production to make your openings meet specialized requirements. In additional we have iinnn  stock ready for shipment our industry leading Adjustable Knock-Down steel frame - a contractor favorite. We ship nationwide and to various countries and military bases around the world.

  • Authorized Factory Distributor

    MDI is a factory autorized distributor/dealer. Our products are factory original and come with the full factory warranty. And if there is a warranty issue, MDI will support your and help facilitate that warranty with the factory.

  • Large Inventory

    We have a large varienty of customers who cater to the utmost descerning clientele. Our large inventory and variety of products readily available allow us to ship orders fast. Get what you need, when you need it.

  • Quoting

    MDI has a lot more doors, frames and hardware available that what is shown in our website. If you need a commercial door, frame or hardware item and don't see what you need, just give us a call. We can make a custom quote or simply direct you to the product in our website. 

  • Service

    Service...what can we say. That's what this company is built on. Since 1972 it's always been about providing good service for our customer. Whether it's a simple door & frame or a special order lockset, providing the correct information in a timaely manner has been paramount at MDI. As we often say, Professional service, quality and reliability are the components and commitment that make up the foundation that MDI®is built on. Build better spaces with MDIsupply.com on your team.