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Brake Line Fittings

Safe braking starts with secure brake connections. Brake line fittings may be small, but they help keep hydraulic pressure sealed inside the braking system every time the brake pedal is pressed. A loose, mismatched, corroded, or poorly seated fitting can cause fluid leaks, soft pedal feel, and reduced braking performance.

During a brake-line repair, the tubing is only one part of the job. The fittings must also match the vehicle’s line size, flare type, thread pitch, and connection point. The right brake line fittings help create secure, leak-resistant connections that stand up to harsh environments.

4Lifetime offers brake line fittings for DIYers and technicians who want high-quality hardware without guessing at fitment. From inverted flare fittings to adapters, unions, tube nuts, banjo bolts, bleeder screws, and compression fitting options, each part supports a cleaner, safer repair.

$0

$48

Showing 1 — 16 of 153 Products
Showing 1 — 16 of 153 Products
3/16" (3/8-24 Inverted) |  Tube Nut | Stainless Steel | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
4 Reviews
3/16" (3/8-24 Inverted) | Tube Nut | Stainless Steel | 10ct
Black Oxide Coated Steel Brake Line Fitting 3/16" Compression Union - 4LifetimeLines LTHPCF316
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
1 Review
High Pressure Compression Fitting Union | 3/16" | Bag of 1
3/16" ( 3/8-24 Inverted) | Steel Tube Nut | 10ct - 4LifetimeLines
Brake Line Fitting
3.0
Rated 3.0 out of 5 stars
2 Reviews
3/16" (3/8-24 Inverted) | Steel Tube Nut | 10ct
3/16" 3/8-24 Inverted | Brass Brake Line Union | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
4 Reviews
3/16" 3/8-24 Inverted Brass Brake Line Union | 10ct
3/16" Metric 10x1.0 Bubble | Steel Tube Nut | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
1 Review
3/16" Metric 10x1.0 Bubble | Steel Tube Nut | 10ct
3/16" (M10x1.0 Inverted) | Tube Nut | Stainless Steel | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
2 Reviews
3/16" (M10x1.0 Inverted) Stainless Steel Tube Nut | 10ct
3/16" | Brass Compression Union | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
6 Reviews
3/16" | Brass Compression Union | 10ct
3/16" (M10x1.0 Bubble) | Tube Nut | Stainless Steel | 10ct - 4LifetimeLines
Brake Line Fitting
4.8
Rated 4.8 out of 5 stars
5 Reviews
3/16" (M10x1.0 Bubble) Stainless Steel Tube Nuts | 10ct
3/8" (5/8-18 Inverted) | Steel Tube Nut | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
1 Review
3/16" (M10x1.0 Inverted) Steel Tube Nut | 10ct
(3/8-24 Inverted) | Brass Brake Line Union Tee | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
4 Reviews
(3/8-24 Inverted) | Brass Brake Line Union Tee | 10ct
1/4" | Brass Compression Union | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
3 Reviews
1/4" Brass Compression Union | 10ct
3/8" (5/8-18 Inverted) | Steel Tube Nut | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
2 Reviews
1/4" (7/16-24 Inverted) Steel Tube Nut | 10ct
3/16" (Metric 10x1.0 Inverted) | Brass Brake Line Union | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
2 Reviews
3/16" (Metric 10x1.0 Inverted) Brass Brake Line Union | 10ct
1/4" (7/16-24 Inverted) | Brass Brake Line Union | 10ct - 4LifetimeLines
Brake Line Fitting
5.0
Rated 5.0 out of 5 stars
1 Review
1/4" (7/16-24 Inverted) | Brass Brake Line Union 10ct