Maretron Mini Cap - Used to Cover Female Connector

The Maretron Mini Cap (M65-0085) is a protective cover designed specifically for female connectors on marine electronics and networking systems. If you've spent time installing or maintaining onboard instrumentation—whether networked sonar, chartplotters, or engine monitoring systems—you know that saltwater exposure degrades connections fast. This small but essential accessory keeps moisture, salt spray, and corrosion away from exposed female connector ports, extending the life of your integrated marine electronics and preventing costly signal loss or equipment failure.

Designed by Maretron, a trusted name in marine networking and NMEA 2000 systems, the Mini Cap fits standard female connector receptacles commonly used in digital marine systems. The compact 1 x 1 x 1 inch form factor weighs just 0.15 lbs, making it lightweight enough to carry spare caps in your tool kit without penalty. The cap's simple slip-on design ensures a snug fit that stays in place during rough water or while underway, protecting against accidental water ingress during connector disconnect-and-reconnect cycles—a frequent maintenance task on boats with multiple integrated sensors and displays.

Any angler or cruiser running a Maretron network, NMEA 2000 backbone, or related marine electronics should keep several of these caps on hand. They're especially valuable if you disconnect transducers, add new equipment, or winterize systems—anytime a female port sits uncovered. Whether you're at the dock replacing a sensor or anchored offshore, having the right protective hardware prevents salt corrosion that can turn a simple disconnection into a troubleshooting nightmare. The Maretron Mini Cap is an inexpensive insurance policy for your marine electronics investment.