4100 Series Portlights

Freeman commercial portlights are designed for use on both elegant yachts as well as high-speed specialty craft where rugged performance is required.

4100 Series portlights incorporate a modular concept that allows easy upgrading when added features, such as deadlight covers or shutters are desired.

Freeman commercial portlights are precision machined from Almag 35 castings on the latest numerically controlled milling centers and finished to the highest standards. Whether custom painted in linear polyurethane, powder coated, or anodized, our commercial portlights are lightweight, fortress strong and corrosion resistant. We’re proud to have had our commercial portlights specified by leading custom yacht builders around the world.

Since ships first went to sea, they have needed fortress-tough protection and round portlights have been a standard for light and ventilation.

4100 Commercial Portlight Design Features

  • Precision Machined Tolerances and Finish

  • Interchangeable Components for Serviceability

  • Heavy-Duty Construction Throughout

  • Knobs, Frames and Coamings All Made of Lightweight, Corrosion Resistant ALMAG 35

  • Custom Finished Per Client Specification

  • Solid Mill Plate Deadlights and Shutters

  • Standard Glazing – 3/8″ Lexan or Tempered: ½” Thick, Tint Available

  • Accepted by Classification Societies Worldwide

Freeman Marine’s 4100 Series portlights are available in a variety of sizes and shapes.

4100 Series Round Portlights – View Drawings

Freeman Marine offers a selection of commercial round portlights.

Freeman Marine 4100 round portlight.

4100 Series Oval Portlights – View Drawings

Freeman oval opening portlights are made of Almag 35 cast aluminum framing with 4 drop bolts, 3/8″ or ½” polycarbonate glazing and have a hold open eye. Perfect for a vessel’s stateroom, fo’c’sle, galley, head, or below deck ventilation/light. Freeman commercial oval portlights enhance the crisp lines of any boat. A comprehensive range of sizes and optional features are available to customize for most requirements.

Freeman Marine 4100 oval portlight.

4100 Series Rectangular Portlights – View Drawings

Freeman Marine offers a selection of commercial rectangular portlights.

Freeman Marine 4100 rectangular portlight.