---
product_id: 222846175
title: "Fastronix Premium High Current 3/8\" Thru Panel Battery Terminal Connectors USA Made"
brand: "fastronix solutions"
price: "€ 63.73"
currency: EUR
in_stock: true
reviews_count: 6
category: "Fastronix Solutions"
url: https://www.desertcart.ie/products/222846175-fastronix-premium-high-current-3-8-thru-panel-battery-terminal
store_origin: IE
region: Ireland
---

# 440A continuous current rating Fits panels up to 7/16" thick Nylon backing nut prevents shorts Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors USA Made

**Brand:** fastronix solutions
**Price:** € 63.73
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your panel like a pro—connect with confidence, install with style!

## Quick Answers

- **What is this?** Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors USA Made by fastronix solutions
- **How much does it cost?** € 63.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/222846175-fastronix-premium-high-current-3-8-thru-panel-battery-terminal)

## Best For

- fastronix solutions enthusiasts

## Why This Product

- Trusted fastronix solutions brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safety First, Always:** Durable nylon backing nut eliminates risk of shorts, ensuring your high-current connections stay secure and safe.
- • **Seamless Panel Integration:** Mounts effortlessly in panels up to 7/16" thick with a precise 1-17/64" hole—perfect for professional-grade installations.
- • **Power Through with Confidence:** 3/8" studs rated for 440 amps continuous, handling momentary spikes up to 550 amps—built for high-demand setups.
- • **Upgrade Your Setup Aesthetics:** Pair with Fastronix rubber terminal covers for a sleek, professional finish that commands respect and envy.
- • **Copper Core for Maximum Conductivity:** Inner copper core guarantees optimal current flow, minimizing power loss and heat buildup.

## Overview

The Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors are USA-made, UL-certified connectors designed for demanding 12V applications. Featuring 3/8" studs rated for 440 amps continuous and momentary spikes up to 550 amps, they mount easily in panels up to 7/16" thick. Their nylon backing nut prevents shorts, while the inner copper core ensures efficient power transfer. Ideal for solar, automotive, and custom battery setups, these connectors deliver professional-grade performance and safety.

## Description

The Fastronix Premium Feed Thru is perfect for any high current applications where power must be fed through a panel. The 3/8" studs allow your battery connections to remain tight during the roughest conditions. Installation is simple by drilling a 1-17/64" hole through any panel up to 7/16" thick. Combine these with Fastronix terminal covers and you'll have professional looking wiring your friends will envy! Maximum torque on the 3/8" studs is 212 in-lbs. Applying too much torque to the studs may cause damage.

Review: Bare Terminal Posts - I haven't bought these because when they are fitted , there is no cover / insulator for these fittings, this makes it very easy to short from the terminal to the vehicle negative .. the bodywork.. All it would take is a slip with a tool . this would short.. and due to the power of the battery, could weld the tool to the body / power post.. or melt the power cable. Other suppliers include insulating boots to stop this. Stay safe...
Review: Well made with good hardware included. Have purchased at least 5 of these. Use them for solar energy storage, custom battery boxes.

## Features

- 3/8" Studs Rated to 440 Amps @ 12 Volts with Momentary 550 Amp Spikes
- Mount in Panels up to 7/16" Thick in a 1-17/64" Hole
- Durable Nylon Backing Nut Eliminates any Question of Shorting and These Can be Mounted in Metal Panels
- Inner Copper Core for High Current Applications
- Use with Fastronix Rubber Terminal Covers 404-110 and 404-111 for a Professional Installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B079K5HB79 |
| Batteries Required? | No |
| Batteries included? | No |
| Colour | Red and Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (563) |
| Date First Available | 2 Feb. 2018 |
| Item Package Quantity | 1 |
| Item Weight | 249 g |
| Item model number | 406-239 |
| Manufacturer | Fastronix Solutions |
| Material | Nylon |
| Package Dimensions | 16.41 x 11.81 x 6.1 cm; 249 g |
| Part number | 406-239 |
| Specification met | UL |
| Voltage | 12 Volts |

## Product Details

- **Colour:** Red and Black
- **Connector type:** Stud
- **Contact material:** Copper
- **Insulation material:** Nylon
- **Terminal:** Bullet Terminal

## Images

![Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors USA Made - Image 1](https://m.media-amazon.com/images/I/719dWA+khEL.jpg)
![Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors USA Made - Image 2](https://m.media-amazon.com/images/I/717YGjPDGCL.jpg)
![Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors USA Made - Image 3](https://m.media-amazon.com/images/I/71ROdW41tQL.jpg)
![Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors USA Made - Image 4](https://m.media-amazon.com/images/I/71TrGnxWqtL.jpg)
![Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors USA Made - Image 5](https://m.media-amazon.com/images/I/81ubiB+iPaL.jpg)

## Questions & Answers

**Q: Can I get 2 red terminals?**
A: I’ve never seen them sold separately. Maybe try to reach the manufacturer, Fastronix Solutions and ask them.

**Q: Any way to use these with Lithium Lifepo4 cells with M6 size terminals?**
A: The Internet half whole size is the size of the red bushing going through the metal wall to insulate it from the metal that the 2 terminals on each side will fit your 4 mm cable

**Q: I am looking for 5/16 or 3/8" thru panel terminals with a voltage rating of 600 vdc and a current rating of 100 amps.  do you have such a product?**
A: No

**Q: Can i attach my factory (2017 coyote 5.0) neg/pos terminals directly to these to pass thru firewall to my trunk mounted battery?**
A: As long as the cables have a 3/8" lug on them you can use this part to pass the power to your new battery location in the trunk.

## Customer Reviews

### ⭐⭐⭐ Bare Terminal Posts
*by J***O on 28 June 2021*

I haven't bought these because when they are fitted , there is no cover / insulator for these fittings, this makes it very easy to short from the terminal to the vehicle negative .. the bodywork.. All it would take is a slip with a tool . this would short.. and due to the power of the battery, could weld the tool to the body / power post.. or melt the power cable. Other suppliers include insulating boots to stop this. Stay safe...

### ⭐⭐⭐⭐⭐ Review
*by L***R on 14 October 2025*

Well made with good hardware included. Have purchased at least 5 of these. Use them for solar energy storage, custom battery boxes.

### ⭐⭐⭐⭐⭐ Review
*by F***R on 15 July 2019*

Came quick and as shown!

## Frequently Bought Together

- Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors USA Made
- Fastronix 3/8" Stud Terminal Covers Red and Black

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-04*