The 3 Best Metric Brake Line Unions (2023 reviews)

metric brake line unions
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Are you planning to buy metric brake line unions, and are you confused about the options ? You have come to the right page.

Our review process:

Our Top Picks:

Frienda Metric Brake Line Union
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Muhize Metric Brake Line Union
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Stop shop Metric Brake Line Union
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Frienda Metric Brake Line Union

Frienda Metric Brake Line Union
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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate union. The frienda metric brake line union is exactly that - it's a simple union that hits all the right notes. These unions are a nice option to join 2 (3/16 inch) brake lines together. It is perfect for splicing a new endpoint onto a 3/16 line. It is good for connecting two shorter lines for easier handling on longer sections. These are double flare fittings. They are close enough so they will thread together with SAE original equipment but that is no doubt where people are having problems.

They are to be used as a unit, 2 nuts and a union to connect two lines together.

Why We Like This:
  • Best product for break line repairs
  • Metric size and metric thread for modern vehicles
  • Good investment for long term

Muhize Metric Brake Line Union

Muhize Metric Brake Line Union
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Not everyone likes to purchase union for their daily usage, but the muhize metric brake line union would be an anomoly. It features and benefits of braking line. It is great for making your own brake lines. It is made of durable brass with unique rust corrosion proofing technology. It fits for regular inverted flare/ double flare sizes for 1/4 inch brake lines tube. It is committed to providing customers with high-quality and safe car accessories so that customers value for money.

Why We Like This:
  • Tubing holes in nuts to large to fit the 1/4" pipe nicely
  • Good brand reputation

Stop shop Metric Brake Line Union

Stop shop Metric Brake Line Union
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The stop shop metric brake line union is suitable and reliable and fits well with your daily purpose. 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 is made from steel plated for corrosion resistance. 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:
  • Fittings and tube size will match factory tubes
  • Worked as designed fit the opposing fitting perfectly
  • Stainless steel looks great and will never rust