Lewmar — Size 0 Opening Stainless Steel Portlight — 239-393020262

Lewmar Size 0 Opening Stainless Steel Portlight 393020262

The Lewmar 393020262 is a Size 0 opening portlight that brings natural light and ventilation below deck, finished with a highly polished stainless-steel outer frame for a clean, premium look on a coach roof or hull side. Grey 8 mm acrylic glazing and a white ABS interior trim ring frame an unobstructed view, and the opening design lets fresh air below without giving up a watertight fit.

Part Details

• Part number: 393020262
• Brand: Lewmar
• Type: Opening portlight, Size 0
• Outer frame: Polished stainless steel
• Interior trim: White ABS
• Acrylic glazing: Grey, 8 mm thick
• Supplied with interior trim and flyscreen
• Weight: 1.5 kg (3.30 lb), per Lewmar's Hatch & Portlight Guide

Dimensions

• Overall: 176 × 323 mm (6-15/16 × 12-11/16 in.)
• Cut-out: 156 × 303 mm (6-1/8 × 12 in.)
• Cut-out corner radius: 52 mm (2-1/16 in.)
• Overall corner radius: 62 mm (2-7/16 in.)
• Overall projection/height: 4 mm (5/32 in.)

Key Features

• Polished stainless-steel outer frame with an unobstructed viewing area
• Handles and hinge system leave the lens clear for a clean, modern look
• Handles cannot vibrate open when in the closed position
• Grey 8 mm acrylic glazing with white ABS interior trim
• Complete with flyscreen
• Installs with marine sealant or closed-cell PVC sealing tape

Compatibility

• Designed for marine hull or coach-roof installations using the Lewmar Size 0 stainless-steel portlight footprint
• Suitable for new installations and replacements where the existing cut-out measures 156 × 303 mm with matching corner radii

Fitment Notice

Confirm the existing opening dimensions, corner radius, and hull thickness before ordering as a replacement. Lewmar specifies installation on a flat mounting surface, and the portlight clamps the cabin side between its inner and outer frames. If you are replacing an older unit, match the 156 × 303 mm (6-1/8 × 12 in.) cut-out rather than the visible outside dimensions.

Installation Notes

• Install on a clean, flat mounting surface using suitable marine sealant or closed-cell PVC sealing tape.
• Verify the cut-out dimensions and corner radii before drilling or modifying the vessel structure.
• Tighten mounting hardware evenly to avoid distorting the frame.

Technical FAQ

Is this a fixed or an opening portlight? This is the Size 0 opening version. Lewmar's Size 0 fixed and opening versions share similar overall dimensions but are different assemblies.

What size cut-out does it need? The specified cut-out is 156 × 303 mm (6-1/8 × 12 in.) with a 52 mm (2-1/16 in.) corner radius.

Is the flyscreen included? Yes. The portlight is supplied with the white ABS interior trim and the flyscreen.

Are service parts available? Lewmar offers individual service components for its stainless-steel portlight range, including acrylic, seals, handles, trim, and flyscreens. See the related products below.

Manufacturer Schematic

Review Lewmar's Hatch & Portlight Guide (PDF) for dimensions, specifications, and installation details.

Related Products

• Lewmar 393020200 Size 0 Standard Portlight — the Size 0 fixed portlight assembly, a different configuration from this opening model.
• Lewmar New Standard Portlight Seal, Size 0 Replacement — a replacement seal for the Size 0 portlight range.

Parts Desk Insights

Best use case: Bringing natural light and ventilation below deck where a polished stainless finish matters, whether on a new coach-roof or hull-side installation or as a replacement for a matching Size 0 opening portlight.

Most common mistake: Ordering by the visible outside dimensions instead of the cut-out. Size 0 fixed and opening versions share similar overall dimensions but are different assemblies, so confirm which one you have.

Sizing and fitment guidance: Match the 156 × 303 mm (6-1/8 × 12 in.) cut-out and its 52 mm (2-1/16 in.) corner radius, and confirm the mounting surface is flat and the hull or cabin-side thickness is compatible before ordering.