Lewmar Size 30 Low Profile Hatch Flange Base

Upgrade your vessel's deck with the Lewmar Size 30 Low Profile Hatch, a go-to choice for boaters seeking reliable ventilation and access without compromising on style or durability. Its streamlined design blends seamlessly into modern powerboats or sailboats, providing ample airflow, natural light, and secure vertical storage access. Whether you're outfitting a compact cruiser or a mid-sized yacht, this hatch delivers exceptional performance in marine environments, standing up to salt spray, UV exposure, and everyday wear.

Standout Features for Everyday Boating

• Convenient outside handles let you open the hatch from deck level when unlocked, making it easy to access gear even in rough conditions.
• Full 180-degree opening capability for maximum access, while friction levers secure it at any angle up to 95 degrees for safe, hands-free use.
• Anodized aluminum frame resists corrosion, ensuring long-term reliability in harsh saltwater settings.
• Curved upper frame adds structural strength and a contemporary aesthetic that elevates your boat's look.
• Smoke gray acrylic glazing offers clear visibility and filters harsh sunlight, reducing glare inside cabins.
• Lockable mechanism provides peace of mind against theft or accidental opening during transit.

Why Boaters Choose This Low Profile Hatch

This hatch excels in high-traffic deck areas like foredecks or cockpits, where space is premium and aesthetics matter. The self-supporting lid eliminates the need for additional props, simplifying operation on the water. At just 8.6 pounds, it's lightweight yet robust, with 5/16-inch thick acrylic that withstands impacts better than standard glass. Perfect for vertical storage in lazarettes or as a ventilation portal, it promotes better air circulation to combat cabin odors and condensation—essential for extended cruises.

Compared to bulkier alternatives, its 1-inch profile hugs the deck, minimizing wind resistance and trip hazards. Boaters report fewer leaks and easier cleaning, thanks to the sealed edges and smooth contours designed for real-world marine abuse.

Detailed Specifications

Precise Dimensions for Perfect Fit

Pro Installation Tips

Mount on a flat surface with no more than 1mm deviation for optimal sealing. Use M6 (1/4-inch) fasteners at the hinge area and 5mm countersunk No.10 UNC or 2 BA screws around the lower frame. Pre-drill holes to prevent cracking the gelcoat, and apply marine sealant liberally under the frame for a watertight bond. Test the friction levers post-install to ensure smooth operation—adjust if needed for your boat's pitch. Regular lubrication of hinges keeps it swinging freely season after season.

Frequently Asked Questions