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Unions

Brake Line Unions – Leak-Proof, Rust-Resistant Connections
4Lifetime offers durable tube-to-tube brake line unions in 3/16", 1/4", and 5/16" sizes. Built to withstand extreme temps, resist corrosion, and ensure a secure, lasting seal—perfect for any brake system repair.

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$44

Showing 1 — 16 of 68 Products
Showing 1 — 16 of 68 Products
$6.99
3/16" | Brass Compression Union | 10ct - 4LifetimeLines
Compression Unions
(No Reviews)
3/16" | Brass Compression Union | 10ct
$8.99
$3.99
1/4" | Brass Compression Union | 10ct - 4LifetimeLines
Compression Unions
(No Reviews)
1/4" Brass Compression Union | 10ct
$9.99
$9.99
$7.99
$8.99
$7.99
3/8" | Brass Compression Union | 10ct - 4LifetimeLines
Compression Unions
(No Reviews)
3/8" | Brass Compression Union
$16.99
$10.99
$9.99
5/16" | Brass Compression Union | 10ct - 4LifetimeLines
Compression Unions
(No Reviews)
5/16" | Brass Compression Union
$12.99
$7.99
$10.99
$1.99
Brass compression union, 3/16, 50/Bag - 4LifetimeLines
Compression Unions
(No Reviews)
3/16" | Brass Compression Union | 50ct
$43.99