Can I get 2 red terminals?

I’ve never seen them sold separately. Maybe try to reach the manufacturer, Fastronix Solutions and ask them.

Any way to use these with Lithium Lifepo4 cells with M6 size terminals?

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

Can i attach my factory (2017 coyote 5.0) neg/pos terminals directly to these to pass thru firewall to my trunk mounted battery?

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.

Fastronix Premium High Current 3 8 Thru Panel Battery Terminal

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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Description

⚡ Connect with Confidence — Power Meets Precision

NYLON BACKING NUT FOR ZERO SHORTS - Safety meets durability in a sleek design
COPPER CORE FOR MAXIMUM CONDUCTIVITY - Ensures efficient power transfer every time
POWER THROUGH WITH 440 AMPS CONTINUOUS - Engineered for high current demands without compromise
MADE IN THE USA WITH PREMIUM CRAFTSMANSHIP - Trust in quality that supports your professional projects
PRECISION FIT FOR PANELS UP TO 7 16 THICK - Versatile installation that adapts to your setup

Fastronix Premium High Current 3/8" Thru Panel Battery Terminal Connectors deliver robust 440A continuous and 550A momentary current capacity, featuring a durable nylon backing nut to prevent shorts and an inner copper core for superior conductivity. Designed for panels up to 7/16" thick, these USA-made connectors combine professional-grade materials and versatile installation options, ideal for automotive, marine, solar, and off-road applications.

Specifications

ASIN	B079K5HB79
Best Sellers Rank	#91,226 in Automotive ( See Top 100 in Automotive ) #319 in Automotive Replacement Battery Terminals & Ends
Brand Name	Fastronix Solutions
Color	Red and Black
Connector Type	Stud
Contact Material	Copper
Customer Reviews	4.8 out of 5 stars 593 Reviews
Insulation Material	Nylon
Insulation Material Type	Nylon
Manufacturer	Fastronix Solutions
Material	Nylon
Material Type	Nylon
Maximum Voltage	12 Volts
Model	406-239
Number of Items	1
Part Number	406-239
Specification Met	UL
Stud Size	3/8
Temperature Rating	221 degree celsius
Terminal	Stud Terminal
UPC	635414975769
Unit Count	1 Count

Reviews

K**N

23.02.2026

A**R

8.12.2024

L**R

14.10.2025

J**S

12.03.2025

S**X

15.02.2021

D**L

15.06.2024

W**S

16.02.2022

G**T

17.02.2023

F**R

15.07.2019

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