Scanstrut Cable Covers, Outlets & Thru-Deck Fittings

Scanstrut Cable Seals & Thru-Deck Fittings: Engineered for Life on the Water

When it comes to routing cables through a boat's deck, the stakes are high. A poor seal invites water intrusion, corrosion, and potential electrical failures at the worst possible moment. Scanstrut has spent decades solving exactly this problem, and their Cable Covers, Outlets & Thru-Deck Fittings represent some of the most thoughtfully engineered sealing solutions available to the marine community.

Founded in 1986 by aeronautical engineer Trevor Reed, Scanstrut is the international market leader in the design and manufacture of installation solutions for marine electronics. That aerospace-influenced design philosophy shows clearly in their deck sealing lineup — every detail, from material selection to fastener design, is optimized for reliability in demanding salt-water environments.

The Cable Clam & Deck Seal Family

Scanstrut's flagship thru-deck products center on their Cable Clam / Deck Seal range. These deck seals are available in four sizes to accept cable connectors as large as 16 mm, 20 mm, 30 mm, or 40 mm, and each size comes in either high-impact glass-filled nylon or 316 stainless steel. That breadth of sizing and material choice makes it straightforward to match the fitting to the specific cable and aesthetic of any vessel.

One of the most installer-friendly features of the Scanstrut deck seal design is its split-seal system. The split-seal option does not require connector removal during installation — a practical advantage when working with pre-terminated antenna or navigation cables. Each of the three included sealing bungs is pre-drilled for a common cable size and split so it just slips onto the cable above the connector; a blank sealing bung is also included for drilling custom holes for multiple cables.

Watertight integrity is verified, not just claimed. All models have been IPX6 and IPX7 tested and approved , meaning they withstand powerful water jets and temporary submersion — conditions that real-world boating regularly produces.

Material Options & Construction Quality

The aesthetic dome-shaped profile provides a stronger, impact-resistant design with no sharp edges, and the outer dome provides an additional water shield. Material choices include 30% glass-filled nylon — UV-stable and hard-wearing — or 316 stainless steel versions. For multi-cable runs, the DS-Multi variant takes a different form: it is an oval-shaped, waterproof seal with a vertical orientation, fitting cable diameters up to 15 mm, with an aluminum housing that is strong and impact-resistant and captive nuts in the base to make assembly easy.

A Cabling Philosophy, Not Just a Product

The Scanstrut range of cabling solutions eliminates the need for time-consuming, substandard cable routing and messy sealants, ensuring a 100% watertight installation for marine cables. This philosophy — clean, repeatable, professional results without specialized trade skills — is what distinguishes Scanstrut's approach from generic cable glands or DIY sealant methods. During its history, Scanstrut has delivered several "world's firsts" and won numerous design and product awards, including a Queen's Award for International Trade.

Whether you are running antenna cables for a chartplotter, routing nav-light wiring, or sealing a multi-cable bundle through the foredeck, Scanstrut's thru-deck fittings bring professional-grade results to DIY installations. Explore the full Cable Covers, Outlets & Thru-Deck Fittings category, or browse everything Scanstrut offers for your vessel.