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Brake Line Fitting Sealing Washer - 4LifetimeLines LTCW5
Brake Line Fitting Sealing Washer - 4LifetimeLines LTCW5

Copper Washer, 3/8 ID, 5/8 OD

$5.99

SKU: LTCW5

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Copper Crush Washer – 3/8″ ID × 5/8″ OD

The 4LifetimeLines® Copper Crush Washer (3/8″ ID × 5/8″ OD) delivers a precision seal for banjo bolts, caliper fittings, and hydraulic connections in your brake system. Made from high-purity copper, this washer compresses under torque to fill surface irregularities, creating a one-time, leak-proof joint essential for safe and reliable braking performance.

Key Benefits

Exact Dimensions: 3/8″ inner diameter and 5/8″ outer diameter for a perfect, snug fit.

Corrosion Resistance: Copper alloy withstands moisture, brake-fluid vapors, and road salt without pitting.

Superior Heat Conductivity: Efficiently dissipates heat from fittings to maintain consistent hydraulic pressure.

One-Time Crush Seal: Deforms under specified torque to seal micro-gaps, preventing fluid leaks.

Durable Performance: Maintains sealing integrity through multiple service intervals when replaced and torqued to spec.

Installation & Usage

Clean Surfaces: Remove old washer material and debris from the mating surfaces.

Position Washer: Place the copper washer onto the bolt or fitting.

Torque to Spec: Tighten the bolt to the manufacturer’s recommended torque—the washer will crush and seal.

Verify Seal: After bleeding the system, inspect under pressure to confirm there are no leaks.


Ready to secure every brake fitting?
Add the 3/8″ × 5/8″ Copper Crush Washer to your cart now and achieve leak-free, precision sealing every time.

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Not sure where to start? No problem. From automotive lubricants to brake lubricants and maintenance solutions, we’re here to help you choose the right products for your vehicle and your project.
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Lifetime Quality, Covered — for Life

Zero Risk, Maximum Confidence

Built to Endure. Guaranteed to Perform.

One-Time Purchase. Lifetime Assurance.

Lifetime Quality, Covered — for Life

Zero Risk, Maximum Confidence

Built to Endure. Guaranteed to Perform.

One-Time Purchase. Lifetime Assurance.

Lifetime Quality, Covered — for Life

Zero Risk, Maximum Confidence

Built to Endure. Guaranteed to Perform.

One-Time Purchase. Lifetime Assurance.

Lifetime Quality, Covered — for Life

Zero Risk, Maximum Confidence

Built to Endure. Guaranteed to Perform.

One-Time Purchase. Lifetime Assurance.

Lifetime Quality, Covered — for Life

Zero Risk, Maximum Confidence

Built to Endure. Guaranteed to Perform.

One-Time Purchase. Lifetime Assurance.

Lifetime Quality, Covered — for Life

Zero Risk, Maximum Confidence

Built to Endure. Guaranteed to Perform.

One-Time Purchase. Lifetime Assurance.

Lifetime Quality, Covered — for Life

Zero Risk, Maximum Confidence

Built to Endure. Guaranteed to Perform.

One-Time Purchase. Lifetime Assurance.

FREE SHIPPING

Spend $50. We Cover the Rest.

BUILT TO ENDURE

No Weak Points. No Compromises.

LIFETIME WARRANTY

One Purchase. Lifetime Coverage.

TRADE FRIENDLY

Tax-Exempt Pricing for Qualified Buyers

The 4Lifetime Difference

Engineered to Last. Backed for Life.

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Built with materials and workmanship we trust. No shortcuts.

A Smart, Risk-Free Buy

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Buy once. Be done.
This isn’t a temporary fix — it’s a long-term solution. Built-in confidence. Zero guesswork.

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What you see is what you get.
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As long as you own it, we’ve got your back.

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Backed for Life

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100+ 5 star reviews

“.. easy to get the part you need, when you need it.”

Jackson

Great Experience

Great received day early good product this is 3rd time doing business with 4LifetimeLines

Happy Customer

Great product!! I’ve ordered these before and they are great quality! I’ll be back again.

Excellent

Excellent product shipped quickly and inexpensively. I will be ordering again.

Ideal Products

Ideal stuff for fabricating brake lines brake lines at a very good price.Kit very well covers the materials for doing the whole brake line system.

Reasonable price and fast shipping!

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Great seller to deal with. Fast shipping and great products.

Great products, competitive prices, and fast shipping. Communication is also top notch.

This was my first purchase and the experience has been fantastic. Great products, competitive prices, and fast shipping. Communication is also top notch.

Great products, competitive prices, and fast shipping.

This was my first purchase and the experience has been fantastic. Great products, competitive prices, and fast shipping. Communication is also top notch.