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  Compact Tubing Bender Kit | 1/4" to 7/8" Soft Tubing | Up to 90º Bends
  $199.99 $49.99
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  NAPA Carlyle Double Flex Line Wrench - Metric, Set of 6
  $145.99 $55.99
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  5/16" x 100' | Copper-Nickel | Fuel & Transmission Line Replacement Coil
  $139.99 $61.99
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  3/8" x 100' | Copper Nickel Fuel & Transmission Line Replacement Coil
  $152.99 $71.99
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Fittings

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Brake Line Fittings – Adapters, Tube Nuts, Unions & More
Find the right connection with 4Lifetime’s high-quality fittings. From bleeder screws and adapters to tube nuts, unions, and compression fittings—our collection is built for tight, leak-free performance in automotive, industrial, and DIY applications. Durable. Reliable. Trusted.

$0

$120

Female 3/8"-24 Inverted"
Female 7/16"-24 Inverted"
Female M10x1.0 Inverted"

Male 1/2"-20 Inverted"
Male 3/8"-24 Bubble"
Male 3/8"-24 Inverted"
Male 7/16"-24 Inverted"
Male 9/16"-18 Inverted"
Male 9/16"-20 Inverted"
Male M10x1.0 Bubble"
Male M10x1.0 Inverted"
Male M11x1.50 Bubble"
Male M12x1.0 Bubble"
Male M13x1.50 Bubble"

Bubble Flare
Inverted Flare

90 Degrees
Straight

Black Oxide Coated Steel
Brass
Nylon
Stainless Steel
Steel

Adapter
Bleeder Screw
Compression Union
Fuel Line Quick Connect
Oil Drain Plug
Oil Drain Plug Gasket
Other
Plug
Tube Nut
Union

0.92mm
1.18mm
1.25mm
1.49mm
29.2mm
29.7mm
30.2mm
32.8mm
33.1mm
35.1mm
35.8mm
38.5mm
38.8mm

5/16"
3/8"
1/2"

1/4"
5/16"
3/8"
1/2"
12mm

1/2"-20
1/4""-28"
3/8""-24"
7/16""-24"
1/2""-20"
9/16""-18"
5/8""-18"
3/4""-16"
M7x1.0"
M8x1.0"
M8x1.25"
M10x1.0"
M10x1.25"
M10x1.50"
M11x1.50"
M12x1.0"
M12x1.25"
M12x1.50"
M12x1.75"
M13x1.50"
M14x1.25"
M14x1.5"
M14x1.50"
M16x1.5"
M16x1.50"
M18x1.50"
M20x1.50"
M22x1.50"
M26x1.50"

3/16"
1/4"
5/16"
3/8"
1/2"
1/8]
6mm
10mm

Showing 1 — 16 of 221 Products

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Showing 1 — 16 of 221 Products

3/16" & 1/4" Fitting Assortment | 32 SKU - 4LifetimeLines

Brake Line Fitting Assortments

(No Reviews)

3/16" & 1/4" Fitting Assortment | 32 SKU

$84.99

3/16" ( 3/8-24 Inverted) | Steel Tube Nut | 10ct - 4LifetimeLines

Brake Line Fittings

(No Reviews)

3/16" (3/8-24 Inverted) | Steel Tube Nut | 10ct

$7.99

3/16" (3/8-24 Inverted) | Tube Nut | Stainless Steel | 10ct - 4LifetimeLines

Brake Line Fittings

(No Reviews)

3/16" (3/8-24 Inverted) | Tube Nut | Stainless Steel | 10ct

$9.99

3/16" Metric 10x1.0 Bubble | Steel Tube Nut | 10ct - 4LifetimeLines

Brake Line Fittings

(No Reviews)

3/16" Metric 10x1.0 Bubble | Steel Tube Nut | 10ct

$8.99

3/16" 3/8-24 Inverted | Brass Brake Line Union | 10ct - 4LifetimeLines

Brake Line Unions

(No Reviews)

3/16" 3/8-24 Inverted Brass Brake Line Union | 10ct

$6.99

Sale

3/16" Brake Line Tubing Clamp | Single Slot | Bag of 10

Tools

(No Reviews)

3/16" Brake Line Tubing Clamp | Single Slot | Bag of 10

^$6.99 $2.99

3/16" | Brass Compression Union | 10ct - 4LifetimeLines

Compression Unions

(No Reviews)

3/16" | Brass Compression Union | 10ct

$8.99

3/16" (3/8-24 Inverted), Long | Steel Tube Nut | 10ct - 4LifetimeLines

Brake Line Fittings

(No Reviews)

3/16" (3/8-24 Inverted), Long Steel Tube Nut | 10ct

$7.99

3/16" (M10x1.0 Inverted) | Tube Nut | Stainless Steel | 10ct - 4LifetimeLines

Brake Line Fittings

(No Reviews)

3/16" (M10x1.0 Inverted) Stainless Steel Tube Nut | 10ct

$11.99

High Pressure Compression Fitting Union | 3/16" | Bag of 1

Compression Unions

(No Reviews)

High Pressure Compression Fitting Union | 3/16" | Bag of 1

$3.99

1/4" | Brass Compression Union | 10ct - 4LifetimeLines

Compression Unions

(No Reviews)

1/4" Brass Compression Union | 10ct

$9.99

3/16" (M10x1.0 Bubble) | Tube Nut | Stainless Steel | 10ct - 4LifetimeLines

Brake Line Fittings

(No Reviews)

3/16" (M10x1.0 Bubble) Stainless Steel Tube Nuts | 10ct

$10.99

3/16" Brake Line Fitting Assortment | 24 SKU - 4LifetimeLines

Brake Line Fitting Assortments

(No Reviews)

3/16" Brake Line Fitting Assortment | 24 SKU

$46.99

3/8" (5/8-18 Inverted) | Steel Tube Nut | 10ct - 4LifetimeLines

Brake Line Fittings

(No Reviews)

3/16" (M10x1.0 Inverted) Steel Tube Nut | 10ct

$9.99

3/8" (5/8-18 Inverted) | Steel Tube Nut | 10ct - 4LifetimeLines

Brake Line Fittings

(No Reviews)

1/4" (7/16-24 Inverted) Steel Tube Nut | 10ct

$6.99

(3/8-24 Inverted) | Brass Brake Line Union Tee | 10ct - 4LifetimeLines

Brake Line Union Tees

(No Reviews)

(3/8-24 Inverted) | Brass Brake Line Union Tee | 10ct

$9.99

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