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Battery Cable Flanged Bulkhead Connector + Insulator Boot - Heavy Duty Weatherproof 12V Copper Core 3/8 Post, 550 Amp Max Rating – for Marine, Solar, Car Audio - Made in the USA (Black & Red)

  • Based on 104 reviews
Condition: New
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Availability: In Stock.
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Arrives Thursday, Oct 22
Order within 7 hours and 36 minutes
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Color: Red + Black


Features

  • IP65 Weatherproof Design - Protect your electrical system from the elements and pass current through a panel or bulkhead up to 13/32" (0.40") thick. Includes a reinforced silicone gasket for the flange of the connector and a boot for the terminal post to keep water, dirt, and debris out
  • High Energy Transfer - The nickel-plated steel 3/8" post and solid copper core allow higher torque than conventional bulkhead connectors with brass shaft. They are continuously rated for 440 amps @ 12V, or a maximum of 550A @12V for up to 12 minutes with a 80% duty cycle. Max voltage rating of 48vDC
  • Easy to Install - A 1.375" hole is all the connector needs to pass through the panel and a large hex nut secures it on the back side. The 4 holes of the flange allow you to use screws or bolts to further secure the connector and prevent any rotation
  • Heavy Duty Construction - The body is made of glass-filled Nylon, the core is made from copper, the silicone gasket is fiberglass reinforced, and the insulator boot has a IP65 weatherproof rating and meets USCG, ISO and ABYC safety requirements for energized terminals
  • Proudly Made in the United States - We are USA based, firefighter-owned, and we stand behind our products. All our connectors and parts are manufactured using high-quality materials. We understand it takes reliable power to get the job done right, so we only offer the best of the best

Description

Passing battery cables through a bulkhead panel or firewall can be a pain at best and can be dangerous if not done properly. With the heavy duty weatherproof flanged bulkhead connector from R2X Racing, you can safely route power from one side of a panel to the other while keeping it protected from the elements. The glass-filled nylon body has a flange with 4 mounting holes to secure it to the panel with screws or bolts, depending on your application. The included fiberglass reinforced silicone gasket seals the flange to the panel and keeps water, dirt, and debris out. The included rubber insulator boot fits cable sizes from 2 AWG to 2/0 AWG and fits snugly into the groove on the connector. The insulator boot has a IP65 weatherproof rating and meets USCG, ISO and ABYC safety requirements for energized terminals. The connector itself is easy to install. Simply drill a 1.375" hole for the main body of the connector and 4 small holes to match the mounting flange. The copper core of the connector allows for high energy transfer with little loss. Because of the flanged mounting design and nickel-plated steel shaft, this connector allows for higher torque than conventional bulkhead connectors with brass shafts. The connector is continuously rated for 440 amps at 12 vdc and can handle a maximum of 550 amps at 12 vdc for up to 12 minutes with an 80% duty cycle. The body is made of glass-filled Nylon and isolates electricity for safe use. Rated for 440 amps @ 12V, or a maximum of 550A @12V for up to 12 minutes, with an 80% duty cycle. The nickel-plated steel 3/8" shaft allows higher torque than conventional bulkhead connectors with brass shaft. The insulator boot has a IP65 weatherproof rating and meets USCG, ISO and ABYC safety requirements.

Manufacturer: ‎R2X Racing


Brand: ‎R2X Racing


Item Weight: ‎12.3 ounces


Package Dimensions: ‎7.2 x 3.35 x 2.32 inches


Item model number: ‎R2X-WPFBC-38


Manufacturer Part Number: ‎R2X-WPFBC-38


Date First Available: August 30, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Oct 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Great product
Color: Red + Black
Awesome product. Very well constructed. Customer service was awesome too, when I wanted additional parts.
Reviewed in the United States on February 22, 2026 by Earl D

  • Extra boots - source
Color: Red + Black
Very well built. Others have asked about additional boots so they can be applied to both sides. This is what I found and works. Looks identical to what comes with these. MGI SpeedWare 1.25" Diameter Boot Cover Would be nice if the advertising identified mounting screw hole diameters and provided recommendations for mounting with gasket on the inside or outside of the bulkhead. ... show more
Reviewed in the United States on November 7, 2025 by Victor

  • heavy duty, large capacity bulkhead fitting.
Color: Red
perfect solution for my firewall starter/charge cable passthrough.
Reviewed in the United States on May 30, 2026 by 74NovaSS

  • Sturdy construction
Color: Red
Great product
Reviewed in the United States on July 10, 2026 by brian perumal

  • Substantial component
Color: Red + Black
Have not used these yet. Look substantial and maybe to big for my intended application.
Reviewed in the United States on November 19, 2025 by Scruffy

  • Bulkhead connector
Color: Red
Nice bulkhead connector, like the four holes to hold it in place, kinda big but appropriate size for the wires it's made to use
Reviewed in the United States on September 27, 2025 by Michael Day

  • Great product
Color: Red
Worked as described
Reviewed in the United States on March 15, 2026 by Donnie Strickland

  • Very robust
Color: Red
Seller has indicated that this item can be returned. Do I do this thru Amazon or the seller direct. Please respond.
Reviewed in the United States on May 30, 2026 by DENNIS KABBA

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