Blue Sea Systems Cable Covers, Outlets & Thru-Deck Fittings

Blue Sea Systems Cable Covers, Outlets & Thru-Deck Fittings

Blue Sea Systems has built its reputation on one principle: electrical components that simply will not fail in the harshest marine environments. That same philosophy extends directly to their lineup of cable covers, outlets, and thru-deck fittings — the often-overlooked hardware that protects every cable run penetrating a hull, deck, or bulkhead on your vessel.

Why Cable Routing Hardware Matters on the Water

Every point where a wire or coaxial cable passes through a deck or hull is a potential vulnerability. Poorly protected cable penetrations invite water intrusion, chafe damage, and corrosion — problems that are particularly unforgiving in saltwater environments. Quality thru-deck fittings and cable clamps seal those openings, support the cable mechanically, and preserve the integrity of your wiring system for the long term.

Blue Sea Systems brings the same engineering standards it applies to circuit breakers and distribution panels to this seemingly simple category. Blue Sea Systems products are designed to meet ABYC, NMMA, and Coast Guard standards, so every fitting in this lineup is built to a level of compliance that gives installers and boat owners genuine peace of mind.

The Cable Clam — A Standout Product

The centerpiece of Blue Sea Systems' offering in this category is the Cable Clam, available in multiple sizes including the popular .825" (model 1002) and 1.385" (model 1003) variants. What makes the Cable Clam notable is its practical design: it allows waterproof co-axial cable installation without requiring the removal of factory connectors. As noted across the marine trade, these fittings "allow waterproof co-axial installation without removing connectors" — a meaningful time-saver that also eliminates the risk of degraded connections caused by re-terminating factory-installed plugs. Each unit ships with stainless steel screws for corrosion resistance.

For larger cable runs, Blue Sea Systems also offers Terminal Feed-Thru Connectors, purpose-built for passing high-current cables through hulls, decks, and bulkheads. These feature mounting faces that can be gasketed or bedded to achieve a watertight installation, and they protect large cables that are prone to chafing at penetration points.

Built for the Marine Environment

Blue Sea Systems products are engineered to withstand the demanding conditions found aboard boats — UV exposure, saltwater spray, vibration, and thermal cycling. As part of a brand with a catalog of over 1,000 integrated electrical products, these cable management fittings are designed to work in concert with the broader Blue Sea Systems ecosystem, from wiring and bus bars to panel components. Their industry-leading warranty backs every product for as long as you own it, reflecting a confidence in materials and manufacture that distinguishes the brand from generic alternatives.

Whether you're doing a clean factory-style electronics installation on a new vessel or retrofitting a radar, VHF, or chartplotter on an existing boat, Blue Sea Systems cable covers, outlets, and thru-deck fittings provide the professional-grade foundation that keeps cables protected, connections reliable, and water where it belongs — outside the hull.