--- product_id: 222846175 title: "Fastronix Premium High Current 3/8\" Thru Panel Battery Terminal Connectors USA Made" brand: "fastronix solutions" price: "£48.40" currency: GBP in_stock: true reviews_count: 6 category: "Fastronix Solutions" url: https://www.desertcart.co.uk/products/222846175-fastronix-premium-high-current-3-8-thru-panel-battery-terminal store_origin: GB region: United Kingdom --- # 440A continuous, 550A spike current 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:** £48.40 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your panel with precision and safety! ## 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?** £48.40 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/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 - • **Upgrade Your Setup:** Pair with Fastronix rubber terminal covers (404-110 & 404-111) for a sleek, insulated, and envy-inducing installation. - • **Copper Core Excellence:** Inner copper core guarantees superior conductivity for peak performance in any high current application. - • **Safety Meets Durability:** Durable nylon backing nut eliminates shorting risks, ensuring your high-current connections stay safe and reliable. - • **Power Through Like a Pro:** 3/8" studs rated for 440 amps continuous and momentary spikes up to 550 amps—built for high-demand setups. - • **Seamless Panel Integration:** Mounts effortlessly in metal panels up to 7/16" thick with a precise 1-17/64" hole—engineered for a clean, professional finish. ## Overview The Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors are USA-made, UL-certified connectors designed for high current applications. Featuring 3/8" studs rated at 440 amps continuous with momentary spikes up to 550 amps, they mount securely in metal panels up to 7/16" thick. The durable nylon backing nut prevents shorts, while the inner copper core ensures optimal conductivity. For a professional, safe, and visually impressive installation, pair with Fastronix rubber terminal covers. ## 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: Came quick and as shown! ## 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 | | Brand | Fastronix Solutions | | Bullet Point | 3/8" Studs Rated to 440 Amps @ 12 Volts with Momentary 550 Amp Spikes, Durable Nylon Backing Nut Eliminates any Question of Shorting and These Can be Mounted in Metal Panels, Inner Copper Core for High Current Applications, Mount in Panels up to 7/16" Thick in a 1-17/64" Hole, Use with Fastronix Rubber Terminal Covers 404-110 and 404-111 for a Professional Installation | | Colour | Red and Black | | Connector Type | Stud | | Contact Material | Copper | | Customer Reviews | 4.8 4.8 out of 5 stars (565) | | Insulation Material Type | Nylon | | Item Package Quantity | 1 | | Manufacturer | Fastronix Solutions | | Manufacturer Part Number | 406-239 | | Material | Nylon | | Model Number | 406-239 | | Number of Items | 1 | | Package Weight | 0.26 Kilograms | | Specification Met | UL | | Stud Size | 3/8 inch | | Temperature Rating | 105 degree celsius | | Terminal | Bullet Terminal | | Title | Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors USA Made | | UPC | 635414975769 | | Unit Count | 1.0 count | ## 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 F***R on 15 July 2019* Came quick and as shown! ### ⭐⭐⭐⭐⭐ Review *by K***N on 23 February 2026* Great quality. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/222846175-fastronix-premium-high-current-3-8-thru-panel-battery-terminal](https://www.desertcart.co.uk/products/222846175-fastronix-premium-high-current-3-8-thru-panel-battery-terminal) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-26*