Garmin Split Connector Threaded f/RJ45 Network Cables - 18mm

Seamless Cable Routing for Marine Electronics

Installing marine electronics like chartplotters, radars, and network expanders often means dealing with tight spaces and the hassle of drilling through hulls or bulkheads. The Garmin threaded split connector for RJ45 network cables changes that. Designed specifically for boaters, this 18mm black collar lets you thread Ethernet cables through existing openings without compromising waterproof integrity or requiring new holes. It's a simple yet ingenious solution that keeps your vessel's wiring clean, organized, and protected from the elements.

Whether you're upgrading your Garmin GPSMAP setup or expanding radar coverage with a GMR series unit, this accessory ensures reliable network connections across your marine system. Boaters appreciate how it maintains signal quality while preventing cable wear from constant exposure to saltwater and vibration.

How the Split Connector Works

This threaded collar features a unique split design that opens up like a clamshell, allowing you to slide it over an RJ45 cable without unplugging connectors. Once positioned, it threads securely into a standard 18mm hole, creating a watertight seal rated for marine environments. The black polymer construction resists corrosion, UV damage, and impacts common on deck or in engine compartments.

• Threaded for secure, vibration-resistant mounting
• Split collar grips cable firmly without pinching wires
• Compatible with standard RJ45 Ethernet cables used in Garmin Marine Network
• Quick installation—typically under 5 minutes per cable run

Pro tip for vessel owners: Use it in bulkheads, transoms, or deck fittings to route multiple network cables from helm stations to transducers or antennas, reducing clutter and improving airflow around electronics.

Extensive Compatibility Across Garmin Marine Devices

Engineered to integrate seamlessly with a wide array of Garmin marine products, this connector supports everything from compact fishfinders to high-end radar domes. Key compatible devices include:

• EchoMAP CHIRP models like 72cv, 72sv, 73cv, and 73dv
• GDL 30/30A satellite receivers
• GMR 12xx, 18, 20/21/24/40, 4xx/6xx radar series
• GMS 10 Network Port Expander
• GPSMAP series chartplotters
• GSD 22/24/25/26 sounders
• Pedestals for GMR 404xHD/406xHD radars

It's versatile enough for custom setups, ensuring your NMEA 2000 or Garmin Marine Network backbone stays connected without signal loss.

Key Benefits for Boaters and Installers

Beyond basic cable pass-through, this Garmin accessory delivers real-world advantages:

• No-Drill Installation: Leverage existing deck hardware or scuppers, saving time and preserving your boat's structure.
• Durability in Harsh Conditions: Built to withstand saltwater spray, temperature swings from -20°F to 140°F, and constant boat motion.
• Clean Aesthetics: Flush mounting hides cables, giving your helm or console a professional look.
• Reliable Networking: Maintains gigabit Ethernet speeds without interference, crucial for real-time sonar, radar overlays, and AIS data.
• Easy Maintenance: The split design allows cable replacement without removing the entire fitting.

Garmin's commitment to innovation shines here—combining utility with rugged reliability that outlasts generic alternatives.

Practical Tips for Optimal Use

To get the most from your split connector, prep your cables by ensuring they're straight and free of kinks. Apply marine sealant sparingly around the threads for extra waterproofing in high-splash areas. For multi-cable runs, consider pairing with Garmin's cable glands or conduit for added protection. Regular inspections during seasonal layups help spot any wear early, extending service life.

Boat owners report fewer network glitches after switching to these connectors, especially on offshore trips where reliability matters most.

Backed by Garmin Quality Assurance

Every Garmin marine accessory undergoes rigorous testing for marine-grade performance, including IPX7 waterproofing and MIL-STD-810 environmental standards. Paired with a limited warranty, it provides peace of mind for serious anglers, cruisers, and commercial operators alike.

Frequently Asked Questions