How big is the head of the boot? heavy duty ftz 1/0 power lugs are over 3/4" wide at the flat part. i'm wondering if they will fit.

The I.D. of the terminal end of the boot is 11/16". These boots do stretch a little bit but that lug is probably a little large for this boot.

will they fit 4/0 cable

The openings on each end are 5/8". The cable will fit through that but it may be tight with the battery cable ends and may require some trimming.

Does fastronix make a boot that works with the high current 3/8" thru panel battery terminal connectors? i tried these , but they don't work.

I've used both those pieces. I ended up warming the covers for pliability, and stretching the boot around the terminal. Has not caused any problems after a year.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Fastronix 3/8" Stud Terminal Covers Red and Black

Product ID: 105853609

Details

Color
Red and Black
Connector Type
Screw
Contact Material
Copper
Insulation Material
Polyethylene
Terminal
Screw Terminal

⚡Fits 3/8" stud & nut securely

🔴Red & Black color-coded clarity

🛡️Prevents accidental shorting

221 DH

Duties & taxes included

In stock

Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Protect your power, perfect your setup!

PRECISION FIT - Flexible yet durable design snugly fits 3/8" studs and nuts, ensuring reliable protection without slipping.
CORROSION DEFENSE - Polyethylene insulation guards terminals against moisture and corrosion, extending battery life.
COLOR CODED SAFETY - Red and black covers for instant polarity recognition and professional wiring aesthetics.
THERMAL RESILIENCE - Engineered to withstand extreme temperatures from -20°F to 140°F, perfect for harsh environments.
UNIVERSAL COMPATIBILITY - Works seamlessly with 2/0 or smaller battery cables and Fastronix 406-252 junction blocks for versatile use.

Fastronix 3/8" Stud Terminal Covers in red and black provide a durable, flexible shield designed to fit securely over 3/8" studs and nuts. Made from high-quality polyethylene, these covers prevent accidental shorting and corrosion while withstanding extreme temperatures, making them ideal for professional-grade battery cable protection and enhanced wiring aesthetics.

Specifications

ASIN	B07NBKWT7Q
Best Sellers Rank	#91,316 in Automotive ( See Top 100 in Automotive ) #352 in Automotive Replacement Battery Terminals & Ends
Brand Name	Fastronix Solutions
Color	Red and Black
Connector Type	Screw
Contact Material	Copper
Customer Reviews	4.7 4.7 out of 5 stars (885)
Insulation Material Type	Polyethylene
Manufacturer	Fastronix Solutions
Material Type	Plastic
Maximum Voltage	300 volts_of_direct_current
Model	404-120
Number of Items	1
Part Number	404-120
Stud Size	3/8 inch
Terminal	Screw Terminal
UPC	635414975844

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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221 DH

Duties & taxes included

In stock

Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Morocco.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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