Wholesale Only Min. $100 Order
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  • MDI knobs are available with either inserts or studs in any thread size, length or depth, including metric.
    Molded from reinforced polymer to provide maximum resitatnce to torque, they also feature a shoulder that prevents clamping pressure from relaxing over time.
  • PLASTIC MATERIALS Our standard knobs are produced in fiberglass reinforced nylon, an extremely tough material that provides superior resistance to impact, torque, and creep. Conductive and other thermoplastic materials and custom colors can be provided.
  • SOFT TOUCH are produced with a core material of fiberglass reinforced nylon for strength. A thermoplastic rubber material is molded over the knob surface to provide a soft and secure grip.
  • CUSTOM KNOBS MDI's unique tooling and production methods allow us to provide custom designs very inexpensively. Company logos and other embossed designs can be molded into our standard knobs for little or no additional cost. MDI can also provide design and engineering assistance when required.
  • Unit of Measure


    Top Hat Knob D

    Dim. A

    N/A 1.13 "

    Dim. B

    N/A .970 "


    N/A fiberglass reinforced nylon
    Level GlidesLevel Glides
    Adjustment KnobsAdjustment Knobs
    Metal Threaded Adapters and Tube ConnectorsMetal Threaded Adapters and Tube Connectors
    Plastic Components and Tube ClosuresPlastic Components and Tube Closures
    Seating ComponentsSeating Components
    Polyurethane MoldingPolyurethane Molding
    Fixture and Display ComponentsFixture and Display Components

    MDI manufactures and distributes quality products including industrial and furniture casters, industrial and office furniture glides and levelers, tube closures, tube connectors, adapters, plastic and metal hardware components. We also stock and offer wide array of adjustments knobs and seating components (bases, arms, foam, wood). We can produce polyurethane molded parts along with custom injection molded parts specific to your needs.