Blue Sea 4005 Standard CableCap - Small Pair

The Blue Sea 4005 Standard CableCap Small Pair provides essential insulation and protection for battery terminals equipped with marine adapter posts. Designed for marine electrical systems, this pair of cable caps (one red, one black) shields exposed connections from corrosion, accidental contact, and saltwater intrusion—critical concerns in the harsh marine environment where exposed battery terminals can degrade rapidly and create safety hazards.

Sized for marine cable gauges 4, 2, and 1 AWG, these standard CableCaps fit batteries that have already been outfitted with marine-grade adapter terminals. The color-coded pair (red for positive, black for negative) follows marine electrical standards, eliminating confusion during installation and maintenance. Blue Sea Systems is the recognized authority in marine electrical safety and distribution, and their CableCap line represents the standard solution for terminal protection across commercial and recreational fleets. The compact design allows easy removal for routine battery checks while maintaining firm, weather-resistant coverage during operation.

This product suits any vessel operator—weekend fishermen protecting a single battery bank, or offshore captains managing multiple installations. Corrosion of exposed battery terminals accelerates in salt air and spray conditions, leading to voltage drop and starting failures. CableCaps prevent this degradation cost-effectively. Proper terminal insulation also reduces the risk of accidental short circuits during maintenance or rough seas when loose equipment can contact exposed connections.

Blue Sea 4005 CableCaps are a simple, proven solution for marine battery terminal protection. They address a specific need—insulating adapter-equipped terminals—and solve it reliably. Whether upgrading an older electrical system or maintaining new equipment, these caps are a cost-conscious safeguard against corrosion and electrical hazards.