Lewmar Size 54 Low Profile Hatch Flange Base
Shipping (3PM)
Within 30 days
Lewmar Size 54 Low Profile Hatch Flange Base Product Description
Upgrade your vessel's deck with the Lewmar Size 54 Low Profile Hatch Flange Base, a sleek engineering marvel designed for seamless integration and superior performance on modern boats. This hatch stands out with its ultra-low 1-inch height, blending effortlessly into any hull line while delivering exceptional ventilation and natural light below deck. Crafted for saltwater resilience, it features robust construction that withstands the rigors of coastal cruising or offshore adventures, ensuring your cabin stays fresh and inviting even on the longest passages.
Engineered for Effortless Performance
Boat owners rave about the Lewmar Size 54's self-supporting design, which eliminates the need for additional props or stays—simply open and forget. The smoke grey acrylic pane offers a modern tint that reduces glare without compromising visibility, perfect for scanning horizons or stargazing at anchor. At just 10.8 pounds, it's lightweight enough for easy handling during installation or maintenance, yet tough enough to endure years of UV exposure and pounding waves.
- Streamlined Aerodynamics: Low-profile silhouette minimizes wind resistance and water shedding for safer, drier decks.
- Premium Acrylic: 5/16-inch thick smoke grey window provides shatter-resistant clarity and UV protection.
- Precision Fit: Generous flange base ensures a watertight seal on curved or flat surfaces.
- Marine-Grade Durability: Anodized aluminum frame resists corrosion in harsh marine environments.
Detailed Specifications
Every measurement is meticulously crafted for compatibility with standard deck cutouts, making replacement straightforward.
| Support System | Lower Frame (in) | Acrylic Colour | Hatch Weight (lb) | Acrylic Window Thickness (in) |
|---|---|---|---|---|
| Self Supporting | 9/16 | Smoke Grey | 10.8 | 5/16 |
| Length X (in) | Width Y (in) | Height Z (in) | Radii R (in) | Cut-Out Length X1 (in) | Cut-Out Width Y1 (in) | Cut-Out Radii R1 (in) |
|---|---|---|---|---|---|---|
| 18 3/16 | 22 11/16 | 1 | 2 7/8 | 15 7/16 | 19 15/16 | 1 11/16 |
Pro Installation Tips for a Lasting Seal
Installing the Lewmar Size 54 is a breeze for DIY sailors or pros alike. Mount to a flat deck surface with no more than +/- 1mm tolerance for optimal sealing. Use M6 (1/4-inch) fasteners at the hinge points for rock-solid pivot action, and 5mm countersunk No.10 UNC or 2 BA screws around the lower frame perimeter. Apply marine sealant generously under the flange to fend off leaks, and torque evenly to avoid warping. Pro tip: Pre-drill holes slightly undersized to grip threads tightly in fiberglass or cored decks—many skippers swear by this for vibration-free operation over thousands of miles.
Once fitted, quick-release catches allow one-handed operation from inside or out, ideal for single-handing or when hands are full. Regular fresh water rinses keep seals pliable, extending service life far beyond competitors.
Why Boaters Trust Lewmar Size 54 for Deck Upgrades
This isn't just a hatch; it's a gateway to enhanced onboard living. Imagine cooler cabins during tropical squats or brighter forepeaks for chart work at dawn. Compared to bulkier alternatives, the low-profile flange hugs the deck tighter, shedding spray efficiently and preserving headroom. Sailors report fewer rattles underway and effortless cleaning—rain alone handles most salt buildup. Whether retrofitting a classic cruiser or outfitting a new build, the Size 54 delivers that premium Lewmar reliability trusted across oceans.
Frequently Asked Questions
What makes the Lewmar Size 54 Low Profile Hatch self-supporting?
The self-supporting mechanism uses integrated gas struts or friction hinges that hold the hatch open at any angle without props, ideal for quick ventilation access.
Is the smoke grey acrylic suitable for bright sunlight conditions?
Yes, the smoke grey tint cuts glare and UV rays effectively, providing comfortable visibility while protecting interior furnishings from fading.
How do I measure my deck for a Lewmar Size 54 cut-out?
Use the cut-out dimensions: 15 7/16 inches long by 19 15/16 inches wide, with 1 11/16-inch corner radii. Template it first to confirm fit.
What screws should I use for mounting the lower frame?
Opt for 5mm countersunk No.10 UNC or 2 BA screws, ensuring they penetrate at least 1.5 inches into the deck for secure hold.
Can this hatch handle heavy offshore use?
Absolutely—its anodized frame and thick acrylic are built for marine extremes, with many owners logging circumnavigations without issues.
How do I maintain the hatch seals for longevity?
Rinse with fresh water after saltwater exposure, inspect seals annually, and lubricate hinges with silicone spray to prevent sticking.
Does the 1-inch height affect cabin headroom?
No, the ultra-low profile preserves maximum headroom while adding style and functionality to tight spaces.
| Support System | Lower Frame (in) | Acrylic Colour | Hatch Weight (lb) | Acrylic Window Thickness (in) |
| Self Supporting | 9/16 | Smoke Grey | 10.8 | 5/16 |
Dimensions
| Length X (in) | Width Y (in) | Height Z (in) | Radii R (in) | Cut-Out Length X1 (in) | Cut-Out Width Y1 (in) | Cut-Out Radii R1 (in) |
| 18 3/16 | 22 11/16 | 1 | 2 7/8 | 15 7/16 | 19 15/16 | 1 11/16 |
Mounting Instructions
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.
"Lewmar Size 54 Low Profile Hatch Brand New Product # 39954030 The Lewmar Size 54 Low Profile Hatch has soft styling and sleek looks, ideal for use on a powerboat. Smaller ventilation hatches are suitable for any deck location on sailboats, while the larger sizes can be used as foredeck hatches on smaller to mid size yachts."
Frequently Asked Questions (FAQ) About Lewmar Size 54 Low Profile Hatch Flange Base
Who is the Lewmar?How to describe Lewmar Size 54 Low Profile Hatch Flange Base?
What is the highlights of Lewmar Size 54 Low Profile Hatch Flange Base?
Who is the Lewmar?
How to describe Lewmar Size 54 Low Profile Hatch Flange Base?
What is the highlights of Lewmar Size 54 Low Profile Hatch Flange Base?
Save $149 when you buy the Lewmar Size 54 Low Profile Hatch Flange Base for only $525 from NVN Marine! Same day shipping before 3pm.
Lewmar Size 54 Low Profile Hatch Flange Base Technical Specifications
| Type: | |
|---|---|
| Vendor: |
Lewmar |
Lewmar Size 54 Low Profile Hatch Flange Base User Reviews
Lewmar Size 54 Low Profile Hatch Flange Base Shipping & Return
For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.