T-H Marine Cable Covers, Outlets & Thru-Deck Fittings

Clean, Protected Wiring with T-H Marine Thru-Deck Fittings

Routing cables and wiring through a boat's deck or hull is one of those details that separates a truly finished build from a rough one — and it's also a critical factor in the long-term health of your electrical and electronics systems. T-H Marine has spent decades earning its place as one of the most trusted names in marine hardware, and their lineup of cable covers, outlets, and thru-deck fittings reflects the same practical, boater-first philosophy found throughout their catalog.

T-H Marine has been serving the marine industry since 1975, and their products are found on virtually every style of recreational boat built in the United States — from bass boats and pontoons to offshore fishing rigs and center consoles. That breadth of OEM and aftermarket experience means their fittings and covers are designed to work seamlessly with real-world boat construction, not just ideal conditions.

What T-H Marine Offers in This Category

T-H Marine's cable cover and thru-deck fitting products are built around the idea of giving wiring and cables a clean, secure, and watertight exit point through fiberglass, aluminum, or composite surfaces. Their lineup includes:

• Decorative Wire Covers — Compact covers designed to conceal wire pass-through holes in decks and bulkheads. These give any installation a polished, factory-finished appearance and are sized to cover holes up to 1-1/4" in diameter, fitting perfectly in tight spaces.
• CeaCap™ Bulkhead Pass-Thru Fittings — A standout product in this category, the CeaCap creates a watertight seal for transom, thru-hull, or thru-deck cables, tubing, and wires, making it an especially practical choice for transducer cable runs on fishfinders and depth sounders.
• Clam Shell Vents & Covers — Additional cover solutions that protect wire exits from water intrusion, UV degradation, and general wear in demanding marine environments.

Why T-H Marine Stands Out for Cable Management

What distinguishes T-H Marine in this category isn't flashy design — it's purposeful engineering. Their injection-molded components come from Innovative Plastics, a wholly owned subsidiary that specializes in precision plastic manufacturing. This in-house production capability allows T-H Marine to maintain tighter quality control and iterate on product designs faster than most competitors.

For boaters and installers who want a finished, professional-looking wiring job, T-H Marine covers and fittings eliminate the unsightly holes and exposed wire runs that can compromise both aesthetics and the integrity of a boat's electrical system. Whether you're installing a new chartplotter, running trolling motor cables, or routing a transducer through the hull, having the right thru-deck fitting makes the difference between a job that looks good for a season and one that holds up for years on the water.

Browse the full Cable Covers, Outlets & Thru-Deck Fittings category to compare options, or explore the complete T-H Marine brand page to discover their broader range of marine hardware and accessories.