The 6 Best Inverted Flare Brake Line Unions (2023 reviews)

The frienda inverted flare brake line union's high-end materials makes sure that it ages well with use. These unions are a nice option to join 2 (3/16 inch) brake lines together. They are close enough so they will thread together with SAE original equipment but that is no doubt where people are having problems. It is fitting for brake lines.

These are double flare fittings. It is easy to use on replacing a rusty brak line. These are to be used as a unit, 2 nuts and a union to connect two lines together. If the line has a pinch you can cut it out and join it back with these couplings. It is great to splice in a couple new sections of brake lines.

Why We Like This:

Best product for break line repairs
Metric size and metric thread for modern vehicles
Good brand reputation

Best For splitting A stock Brake Line: Stop shop Inverted Flare

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The stop shop inverted flare should be able to handle its purpose and duties with ease. If you have a brake line that needs to be bent by hand this is absolutely the way to go. It is great for splitting a stock brake line down to less-ridiculous length and with less absurd routing. It is made from 304 stainless tubing. The Tube nuts in this set use a M10 flare wrench, and the brass union uses a 13mm wrench to counterhold. It has a wall thickness of 304 stainless tubing. It can be connected directly to original steel tubes on vehicles. It does require a higher end flaring tool. It will save you from unexpected downtime if you need to repair a line, or borrow from the set to replace just a male fitting.

Why We Like This:

Stainless steel looks great and will never rust
Worked as designed fit the opposing fitting perfectly
Good brand reputation

Best With most vehicles: auto Supplies Direct Inverted Flare Brake Line Union

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The auto supplies direct inverted flare brake line union should be able to handle its purpose and duties with ease. This assortment comes in a pack of 15, making it easy to store and keep organized in a mechanic shop or garage. It includes 5 short nuts, 5 long nuts, and 5 unions, providing mechanics with a variety of fittings to choose from to best fit their needs. It includes a total of 15 fittings that are compatible with 1/4" steel, copper, nickel, poly armour, and cupronickel tubing, making it a versatile and cost-effective solution for mechanics who need to replace or repair brake lines.

These fittings are not just limited to brake lines but can also be used for fuel lines and other automotive applications, making them a versatile addition to any mechanic's toolkit. It comes with the most common inverted flare/double flare size, these fittings are easy to install and use, making brake line repair a breeze. The nuts are the exact same thread pitch and everything and the long ones can be used with the short ones but on some vehicles the short ones cannot be used with the long ones or supposed to be. It will last a long time and not be affected by rust.

It is compatible with most vehicles, these fittings offer a versatile and cost-effective solution for mechanics who need to replace or repair brake lines.

Why We Like This:

Compatible with 1/4" steel, copper, nickel, poly armour, and cupronickel tubing
New and hot release

Best performance product: Stop shop Inverted Flare Brake Line Union

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The stop shop inverted flare brake line union should be able to handle its purpose and duties with ease. If you work on small fuel, brake, or hydraulic lines then you need some of these on hand for your repair/emergency needs. This nylon tube can be connected directly to original steel tubes on vehicles. It is made from 304 stainless tubing. It is made from steel plated for corrosion resistance. It does require a higher end flaring tool. If you have a brake line that needs bent by hand this is absolutely the way to go.

This tubing has a wall thickness of..

Why We Like This:

Stainless steel looks great and will never rust
Fittings and tube size will match factory tubes
One of the new comers and featured product

Best For use: auto Supplies Direct reliable and versatile Union

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Designed to fit the most common 5/16" SAE inverted flare / double flare size, these unions are ideal for a wide range of applications. These unions feature a 1/2" - 20 thread, which makes them easy to install and ensures a secure fit. They are not only ideal for use in automotive brake line systems but also versatile enough to use in other mechanical projects as well.

It is constructed from safe and professional quality brass, these unions are lead-free and high-pressure resistant, making them durable and reliable for use in automotive brake line systems. These are compatible with 5/16" steel, copper, nickel poly armour, and cupronickel tubing, which makes them versatile and easy to use with your preferred brake line of choice. This pack includes five unions, so you can stock up and have spares on hand, reducing downtime in case of a replacement.

Why We Like This:

Compatible with 5/16" steel, copper, nickel poly armour, and cupronickel tubing
High pressure resistant, constructed from safe and professional quality brass, lead free
Lot of satisfied buyers

Best Feature: Easy TO install: Muhize Inverted Flare Brake Line Union

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The muhize inverted flare brake line union's superior materials makes sure that it ages well with use. It features and benefits of braking line. It is committed to providing customers with high-quality and safe car accessories so that customers value for money. It is made of durable brass with unique rust corrosion proofing technology. These work well to tighten them up and no leaks. It is fits for regular inverted flare/ double flare sizes for 3/16 inch brake lines tube. These couplers work well to splice it back together. It is great for making your own lines.

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