Lewmar Size 20 Ocean Series Hatch Flat Base
Lewmar Size 20 Ocean Series Hatch Flat Base — Product description
Upgrade your vessel's deck with the timeless reliability of the Lewmar Size 20 Ocean Series Hatch Flat Base. Designed for sailors who demand performance in harsh marine environments, this hatch combines classic aesthetics with battle-tested durability. Whether you're outfitting a coastal cruiser or preparing for offshore adventures, its flat base ensures a seamless, low-profile fit that enhances both functionality and style.
Engineered for Real-World Marine Challenges
Crafted from anodized aluminum, this hatch stands up to relentless exposure to salt spray, UV rays, and pounding waves. The friction levers allow precise control, holding the lid securely at any angle up to 95 degrees—ideal for channeling fresh air below decks during those sweltering anchorages or maintaining visibility while underway. Skip the fuss of trim kits or roller shades; this flat base model prioritizes straightforward installation and uncompromised strength.
Precision Fit and Easy Installation
Engineered for flat surfaces with a tight tolerance of +/- 1mm, it mounts flush without gaps that trap water or dirt. Use M6 or 1/4" fasteners at the hinge for rock-solid support, and 5mm CSK screws (No.10 UNC or 2 BA) along the lower frame for a clean finish. Boaters often praise how quickly it integrates into existing deck layouts, minimizing downtime during refits. Pro tip: Always double-check your deck's flatness with a straightedge before cutting—small undulations can affect sealing performance over time.
- Corrosion-Resistant Frame: Anodized aluminum laughs off rust, extending the hatch's lifespan even in brackish waters.
- Adjustable Opening: Friction hinges provide infinite positioning, from a crack for breeze to fully open for maximum light and airflow.
- Low Maintenance Design: No complex mechanisms to seize—just wipe down seals with fresh water after salty passages.
- Proven Track Record: Trusted on thousands of boats worldwide, from weekend racers to bluewater explorers.
Why This Hatch Excels on the Water
Beyond specs, the Lewmar Ocean Series shines in practical scenarios. Imagine heaving-to in a squall: the robust construction sheds water effortlessly, protecting your cabin from ingress. Or during extended cruises, where superior ventilation combats diesel fumes and cooking odors. Unlike flimsier alternatives, its rugged build handles the flex and torque of a working deck, reducing leaks from fatigue. Sailors swapping out old hatches report noticeable improvements in interior comfort and reduced noise from wind buffeting.
Care and Longevity Tips from Seasoned Skippers
To keep it performing like new, rinse with fresh water after every outing and inspect seals annually—replace with genuine Lewmar gaskets if they harden. Lubricate friction levers sparingly with silicone-based grease to avoid attracting grit. Avoid harsh chemicals; mild soap suffices for that showroom shine. With proper care, this hatch becomes a fixture on your boat for decades, outlasting multiple voyages.
Frequently Asked Questions
Can the Lewmar Size 20 Ocean Hatch Flat Base fit on slightly curved decks?
No, it's designed exclusively for flat surfaces with a maximum tolerance of +/- 1mm. For curved decks, consider alternative base options from Lewmar to ensure a watertight seal.
What fasteners are required for installing this flat base hatch?
Hinge sections use M6 or 1/4" fasteners, while the lower frame calls for 5mm CSK screws (No.10 UNC or 2 BA). Stainless steel hardware is recommended for marine environments.
Does this hatch work with trim kits or roller shades?
Flat base models like this one are not compatible with trim kits or roller shades, keeping the design simple and robust for direct mounting.
How does the friction lever system work on the Ocean Series hatch?
The levers provide adjustable friction, holding the lid open at any position up to 95 degrees. This allows customizable ventilation without slamming shut in gusts.
Is the frame material suitable for saltwater use?
Yes, the anodized aluminum frame offers excellent corrosion resistance, making it ideal for offshore sailing and trailered boats in coastal areas.
How do I maintain the seals on this Lewmar hatch?
Rinse with fresh water after exposure to salt, inspect yearly, and apply a UV protectant. Avoid petroleum-based products to prevent degradation.
What makes the Ocean Series different from other Lewmar hatches?
Its classic styling and heavy-duty construction prioritize ruggedness for demanding conditions, unlike lighter series for casual use.
Lewmar Size 20 Ocean Hatch Flat Base
Model: 39620050- Fit to a flat surface with a maximum tolerance of +/- 1mm.
- Fastening size at hinge section use (M6 / 1/4").
- Fastening size for lower frame use 5mm CSK screw No.10 UNC 2 BA.
- Flat base hatches cannot be used with Trim kits or Roller shades
- Friction levers hold the lid open in any position up to 95°
- Anodised aluminium frame for corrosion resistance
With its classic style, the Ocean Hatch is fitted to thousands of boats around the world. Its rugged construction provides the ultimate protection against the elements, whatever conditions you might face.
SKU: NVN-1002376
MPN: 39620050
UPC:
Technical specifications
| Brand | Lewmar |
| Model | Lewmar Size 20 Ocean Series Hatch Flat Base |
| SKU / MFR# | 1002376 |
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