OUKENS 3/8in Through-Panel Battery Terminals 2‑Pc Red & Black Bulkhead Connectors 250A — Brass/Zinc, Rubber-Insulated

OUKENS 3/8in remote through-panel battery terminals are a two-piece positive and negative bulkhead connector set that lets you route high-current battery cables through panels cleanly and securely up to 250A.

These through-panel terminal posts are made to simplify battery cable routing in cars, RVs, boats and other equipment that requires a tidy firewall or bulkhead feed-through. Each kit contains one red (positive) and one black (negative) connector designed to fit a standard 3/8" (9.5mm) panel hole. Built with durable metals and resilient rubber insulation, the connectors prioritize corrosion resistance, a smooth mechanical action, and straightforward DIY installation.

How do these connectors make wiring neater and safer?

By moving the connection point to the panel surface, these bulkhead posts eliminate exposed cable ends tucked behind panels and reduce clutter in engine bays and compartments. The insulated housing and color-coded terminals lower the chance of accidental contact or mis-wiring when connecting accessories or running starter and auxiliary lines.

• Provides a clean firewall or bulkhead pass-through for battery cables
• Red/black color coding simplifies positive/negative identification
• Rubber insulation protects against short circuits and abrasion
• Mounts flush to a panel for a tidy, professional finish

What materials and construction ensure durability and corrosion resistance?

The OUKENS terminals combine wear-resistant brass conductors with high-strength zinc alloy components and a molded rubber insulating collar. These materials were selected to resist salt, humidity and mechanical wear common in marine and automotive environments.

• Brass studs for reliable electrical contact and low resistance
• Zinc alloy hardware for mechanical strength and longevity
• Molded rubber grommet for sealing and vibration damping
• Engineered anti-lock mechanical feature reduces jamming risk

How straightforward is installation and what tools are required?

Installation is designed for DIYers: the connector fits into a 3/8" (9.5mm) panel hole and secures with a nut from the accessible interior side. Basic hand tools—wrenches and a drill or file to prepare the hole if needed—are typically all that’s necessary, and color-coded posts make final hookups fast.

• Fits a standard 3/8" (9.5mm) panel hole—verify before fitting
• No specialized crimping tools required for mounting the terminal
• Secures with exterior post and interior nut for a strong bulkhead seal
• Simple wiring steps suitable for hobbyists and technicians

Will these handle high-current loads and where are they best used?

Each terminal is rated to handle currents up to 250A, making them suitable for heavy accessory circuits, house battery feeds, and starter feed-throughs when used appropriately. They’re commonly used in automotive, RV, marine and off-grid setups where a robust, accessible connection point is needed on a panel or bulkhead.

• Rated for up to 250 amps continuous use in typical installations
• Ideal for starter feeds, solar or inverter battery routing, and accessory power
• Designed for cars, trucks, RVs, boats, and other powered vehicles
• Color-coded pair reduces wiring mistakes in multi-battery systems

Who is this for: If you install or maintain vehicle or marine electrical systems and want a tidy, heavy-duty way to route battery cables through walls or bulkheads, this OUKENS two-piece terminal kit is a practical choice. It suits DIY mechanics, professional installers, RV owners, boaters and anyone upgrading cable routing for easier access, cleaner appearance, and improved safety. Always confirm your panel hole size and wiring requirements before purchase, and follow safe battery-handling practices during installation.