Eliminate trial-and-error when plumbing metric brake and fuel lines with the 4LifetimeLines® Metric Brake Line Fitting Size Gauge. This pocket-sized anodized-aluminum tool instantly verifies the most common metric thread pitches—M10×1.0, M10×1.25, M12×1.0 and M12×1.5—so you always grab the correct nut, union or adapter on the first try.
Why You Need a Metric Fitting Gauge
Mixing up fittings leads to cross-threading, fluid leaks and wasted tubing. Instead of carrying multiple adapters or measuring with calipers, simply insert the flare end or nut into the matching slot. A precise “snap” fit confirms the size and pitch, ensuring perfect thread engagement every time. Whether you’re a professional technician or a weekend DIYer working on European and Asian vehicles, this gauge brings speed and confidence to every brake-line job.
Key Features
Four Precision-Milled Slots check M10×1.0, M10×1.25, M12×1.0 and M12×1.5 thread pitches
Anodized-Aluminum Construction resists corrosion and won’t deform under shop conditions
Engraved Size Labels stay legible through grease, brake fluid and grime
Pocket-Sized Convenience fits on a key ring or in your tool pouch for instant access
Universal Compatibility works with steel, copper-nickel and stainless-steel lines
How to Use
Insert the flare nut or tube end into each gauge slot until you find a snug fit. Match the engraved stamp to confirm the metric thread size, then select the corresponding fitting from your kit. This quick check prevents mismatches before tightening, saving you time and materials.
Ready to stop guessing and ensure leak-free metric connections? Add the Metric Brake Line Fitting Size Gauge to your cart today and build with confidence on every job.
