Sea-Dog Terminal Post 426808-1, 5/16-18 Stud with Nylon Cover, 48VDC 150A

The Sea-Dog Terminal Post 426808-1 is a marine-grade battery connection stud built to meet ABYC/USCG requirements for covered terminal connections. It combines a stainless steel terminal stud with an injection molded nylon body and includes a protective cover, giving you a corrosion-resistant, insulated connection point for battery cables, bus systems, and other high-current wiring runs aboard a boat. The stud size is 5/16-18, and the terminal post mounts to a panel or bulkhead using four #10 RH fasteners (not included).

Rated for a maximum of 48VDC at 150A, this terminal post is sized for demanding 12V, 24V, and 48V marine electrical systems where a secure, weatherproof stud connection is needed. The nylon housing resists saltwater corrosion and electrical arcing better than exposed metal studs, while the included cover keeps the live connection protected from accidental contact and spray. Overall footprint dimensions are 3-3/4 inches by 1-11/16 inches, with a post height of 1-5/8 inches, a base thickness of 1-5/16 inches, and a mounting hole spacing of 2-3/16 inches.

This terminal post is a universal marine electrical component, suitable for battery banks, distribution posts, bus bars, and any panel application calling for a covered, ABYC/USCG-compliant 5/16-18 stud terminal.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 426808-1
• Material: Injection Molded Nylon/Stainless Steel
• Stud Thread Size: 5/16-18
• Mounting Fastener: #10 RH (not included)
• Dimension A (Length): 3-3/4 inches
• Dimension B: 1-11/16 inches
• Dimension C (Post Height): 1-5/8 inches
• Dimension D: 1-5/16 inches
• Dimension E (Mounting Spacing): 2-3/16 inches
• Maximum Rating: 48VDC, 150A
• Weight: 0.10 pounds
• Standard Pack: 5 each
• Compliance: Meets ABYC/USCG cover requirements
• UPC: 035514427586

Fitment

Universal marine electrical application; not specific to a single make, model, or engine.

Replaces (OEM)

No OEM cross-reference numbers are listed for this part number.

Frequently Asked Questions

What stud size does the Sea-Dog 426808-1 terminal post use? The Sea-Dog Terminal Post 426808-1 uses a 5/16-18 threaded stud for the battery or bus connection.

Is this terminal post ABYC/USCG compliant? Yes, the 426808-1 includes a protective cover so the assembly meets ABYC/USCG requirements for covered terminal connections.

What is the maximum voltage and current rating for part 426808-1? It is rated for a maximum of 48VDC at 150A, making it suitable for 12V, 24V, and 48V marine electrical systems.

What material is the Sea-Dog 426808-1 terminal post made from? This terminal post is constructed of injection molded nylon combined with a stainless steel terminal stud.

How is the 426808-1 terminal post mounted? It installs using four #10 RH fasteners, which are not included with the terminal post.

Does the 426808-1 come with a cover? Yes, the Sea-Dog Terminal Post 426808-1 includes a cover as part of the assembly to protect the live connection.

What are the overall dimensions of this terminal post? Part 426808-1 measures 3-3/4 inches by 1-11/16 inches overall, with a 1-5/8 inch post height, a 1-5/16 inch base dimension, and 2-3/16 inch mounting hole spacing.

How much does the Sea-Dog 426808-1 terminal post weigh? The 426808-1 terminal post weighs 0.10 pounds.

Will this terminal post work with any boat or is it model-specific? The 426808-1 is a universal marine electrical terminal post and is not restricted to a specific boat make or model.

What is the difference between the 426808-1 and the 426810-1 terminal post? The 426808-1 uses a 5/16-18 stud, while the 426810-1 uses a larger 3/8-16 stud; both share the same overall body dimensions and mounting pattern.

Are the mounting fasteners included with the 426808-1? No, the four #10 RH fasteners needed to mount the 426808-1 terminal post are not included and must be sourced separately.

Is nylon a durable material for a marine battery terminal post? The injection molded nylon housing on the 426808-1 resists saltwater corrosion, making it a durable choice compared to exposed metal terminal hardware.