Blue Sea Systems PowerPost Insulated Battery Terminal Post 2018, 5/16 Inch and 3/8 Inch Studs, 48V DC

The Blue Sea Systems PowerPost 2018 is an insulated battery terminal post connector designed for connecting high amperage conductors on a boat's electrical system. It is built to accept both 5/16 inch and 3/8 inch stud connections, giving installers flexibility when stacking multiple ring terminals on a single post. The 2018 is also designed for outboard engine installation, making it a practical choice when factory battery cables need to be extended to reach a relocated battery or accessory panel.

Each PowerPost uses one-piece serrated flange nuts that bite into the ring terminal for a correct, secure, and vibration-resistant connection, reducing the chance of a loose terminal working free over time. The connector body is molded from blue plastic for corrosion resistance and easy circuit identification, while the post and contact surfaces are copper for reliable conductivity. The connector is not amperage-rated as a standalone part; the amperage that flows between terminals stacked on the post is determined by the gauge of wire and the terminals used in the connection. It carries a maximum operating voltage of 48 volts DC and uses #10 (M5) screws.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 2018
• Stud Sizes: 5/16 Inch and 3/8 Inch
• Screw Size: #10 (M5)
• Maximum Operating Voltage: 48 Volts DC
• Amperage Rating: Not rated - amperage flows between terminals stacked on post and is determined by wire and terminals used
• Connector Type: Screw
• Contact Material: Copper
• Body Material: Plastic
• Color: Blue
• Temperature Rating: 257 degrees Fahrenheit
• Weight: 0.35 pounds
• UPC: 632085020187

Fitment

Universal marine battery post application; suited to outboard engine installations where factory cables need extending, and to any 12 volt or lower DC system where the maximum 48 volt DC operating rating is not exceeded.

Replaces (OEM)

No OEM cross-reference numbers are specified for this part.

Frequently Asked Questions

What is the Blue Sea Systems PowerPost 2018 used for? The PowerPost 2018 connects high amperage conductors at a single terminal post, and it is also designed for outboard engine installations where factory battery cables need to be extended.

What stud sizes does the 2018 PowerPost accept? It accepts both 5/16 inch and 3/8 inch stud connections, so ring terminals sized for either stud can be stacked on the same post.

Is the PowerPost 2018 amperage rated? No, the connector itself is not amperage-rated. The amperage that flows between terminals stacked on the post is determined by the wire gauge and terminals used in the connection, not by the PowerPost 2018 body.

What is the maximum voltage rating of the 2018 connector? The Blue Sea Systems 2018 has a maximum operating voltage of 48 volts DC.

What screw size does the PowerPost 2018 use? It uses #10 (M5) screws for securing terminal connections.

How do the flange nuts on the 2018 keep connections secure? One-piece serrated flange nuts bite into the ring terminal, ensuring a correct and secure connection that resists loosening from vibration.

What material is the PowerPost 2018 made from? The body is blue plastic for corrosion resistance and circuit identification, while the contact surfaces are copper for reliable conductivity.

How much does the Blue Sea Systems 2018 weigh? The PowerPost 2018 weighs 0.35 pounds.

What temperature range can the 2018 connector handle? It carries a temperature rating of 257 degrees Fahrenheit.

Can the PowerPost 2018 be used to extend outboard engine battery cables? Yes, the 2018 is specifically designed for outboard engine installation when factory cables need to be extended.

Does the 2018 PowerPost come with cross-reference or OEM replacement numbers? No OEM cross-reference numbers are listed for the Blue Sea Systems 2018 PowerPost connector.