The 7 Best Stainless Steel Brake Line Unions (2023 reviews)

We consider a stainless steel brake line union to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

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Our Top Picks:

Best overall: Buy: Frienda Stainless Steel Brake Line Union READ REVIEW

Best For making A Brake Line repair: Buy: Muhize Stainless Steel Brake Line Union READ REVIEW

Best For splicing Lines: Buy: Stop shop Stainless Steel Brake Line Union READ REVIEW

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

Best With compression Fitting: Buy: Dorman Stainless Steel Brake Line Union READ REVIEW

Best For use: Buy: auto Supplies Direct Stainless Steel Brake Line Union READ REVIEW

Best value For money: Buy: Muhize Stainless Steel Brake Line Union READ REVIEW

Best overall: Frienda Stainless Steel Brake Line Union

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If you are looking to buy an all-around great union for your daily purpose, frienda stainless steel brake line union is the right option. These unions are a nice option to join 2 (3/16 inch) brake lines together. It is great for making your own brake lines. It is made of quality brass to prevent rust and plated for corrosion resistance. It is good for connecting two shorter lines for easier handling on longer sections.

These are double flare fittings. They fit 3/16 factory Ford brake lines and don't leak. 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 perfect for joining brake lines if the line has a pinch so you can cut it out and join it back with these couplings.

• Best product for break line repairs
• Metric size and metric thread for modern vehicles
• New and hot release

Best For making A Brake Line repair: Muhize Stainless Steel Brake Line Union

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For a low asking price, muhize stainless steel brake line union has managed to overwhelm their customers by packing as many features as they could. It features and benefits of a braking line. It is committed to providing customers with high-quality and safe car accessories so that customers value for money. It is fit for regular inverted flare/ double flare sizes for 3/16 inch brake lines tube. The nuts (fittings) are steel. They do not leak.

The holes for the tubing to go through are a bit on the large side. These are great to keep on hand so you have them when you need them. It is made of durable brass. It is perfect for making a brake line repair.

• Don't forget a little anti-seize, helps when going together and taking apart
• Worked great for brake line repair
• Good brand reputation

Best For splicing Lines: Stop shop Stainless Steel Brake Line Union

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The stop shop stainless steel brake line union's superior materials makes sure that it ages well with use. If you have a brake line that needs to be bent by hand this is absolutely the way to go. These couplings can be used with single or double flared tubing. It is made from steel plated for corrosion resistance. It does require a higher end flaring tool. It is great for splicing lines.

This part makes a solid junction when you have to extend a brake line. It has a wall thickness of 304 stainless tubing. They will work with any inverted/double flare type fitting for 3/.

• 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 splitting A stock Brake Line: Stop shop Inverted Flare

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We would, of course, be remiss if we didn't mention stop shop inverted flare for regular usage. 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. 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.. It can be connected directly to original steel tubes on vehicles. It does require a higher end flaring tool. It is made from steel plated for corrosion resistance. 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.

• Stainless steel looks great and will never rust
• Fittings and tube size will match factory tubes
• Worked as designed fit the opposing fitting perfectly

Best With compression Fitting: Dorman Stainless Steel Brake Line Union

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We would, of course, be remiss if we didn't mention dorman stainless steel brake line union for daily purpose. These fittings make a simple and fast brake line repair using the copper infused steel brake line to replace the bad section. It holds not only this leaking brake line but fuel lines. It only works with hard lines like brake line. It can be used on pinhole leak on brake line. It is available in many different styles, including elbows, union, and tees.

They also used these Dorman compression fittings on brake lines with success. It is suitable for a broad range of industrial and commercial uses.

• Installed on stainless steel brake lines
• Super easy install and a cleaner look
• Delivers what they promise

Best For use: auto Supplies Direct Stainless Steel Brake Line 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.

• High pressure resistant, constructed from safe and professional quality brass, lead free
• Compatible with 5/16" steel, copper, nickel poly armour, and cupronickel tubing
• Delivers what they promise

Best value For money: Muhize Stainless Steel Brake Line Union

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Next on the list, we've got yet another union that manages to win our hearts. It's the muhize stainless steel brake line union and it's widely considered as one of the best value for money union you can buy. 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. It features and benefits of braking line. These couplers work well to splice it back together. It is fits for regular inverted flare/ double flare sizes for 3/16 inch brake lines tube. These work well to tighten them up and no leaks. It is easy to use, good quality solid brass and wont rust.

• Made out of good quality brass to prevent future rusting
• Delivers what they promise