Copper Crush Washers, Pack of 10

£2.09

In Stock

FREE UK Delivery

Order by 3pm for same-day dispatch. Worldwide delivery available.
FREE Returns

100-day hassle-free returns – exchange or refund with no questions asked.

Copper Crush Washers – Pack of 10 Sealing Washers for Brake, Clutch & Fuel Line Fittings

Ensure leak-free performance in your hydraulic systems with our high-quality copper crush washers. Supplied in a handy pack of 10, these soft-metal sealing washers are ideal for brake lines, clutch hoses, fuel rails, and oil system fittings. Each washer deforms under pressure to form a tight, durable seal between mating surfaces.

Key Features of Our Copper Crush Washers

Soft Copper Construction for Reliable Sealing

Made from annealed copper, these crush washers are soft enough to compress during installation, ensuring an effective hydraulic seal while resisting corrosion and vibration-related leaks.
Value Pack of 10 Copper Crush Washers

Each pack contains 10 copper crush washers, making them perfect for workshop spares, brake line servicing, or full system overhauls. Ideal for both professional mechanics and home garage use.
Available Sizes to Fit Common Banjo Bolts & Fittings

Select the right internal diameter for your application. Compatible with a wide range of standard banjo bolts and hydraulic fittings:
- 6mm Eye (M6)
- 8mm Eye (M8)
- 10mm Eye (M10, 3/8", 1/8" BSP)
- 11mm Eye (7/16", AN4)
- 12mm Eye (M12)
- 14mm Eye (M14, AN6)
These copper sealing washers ensure precise fitment for both metric and imperial fittings.

Recommended Use

For the best sealing results, pair these copper crush washers with our Stainless Steel Banjo Bolts and Custom Brake Lines. Whether you're working on brake systems, clutch hydraulics, fuel delivery, or turbo oil feeds, these washers offer professional-grade sealing under pressure.

Upgrade your hydraulic fittings with dependable copper crush washers – the trusted choice for high-pressure sealing in automotive, motorsport, and engineering applications.

Reviews

All reviews are 100% authentic from verified customers.

Specifications

Product Code

Internal Diameter

Compatibility

WSH-CRU-CU-6

6mm

WSH-CRU-CU-8

8mm

WSH-CRU-CU-10

10mm

M10, 3/8", 1/8" BSP

WSH-CRU-CU-11

11mm

7/16", AN4

WSH-CRU-CU-12

12mm

M12

WSH-CRU-CU-14

14mm

M14, AN6

Frequently Asked Questions

What are copper crush washers used for?
Copper crush washers are used to create a leak-proof seal between fittings and flat surfaces in pressurised fluid systems. Commonly used in automotive brake lines, clutch hydraulics, fuel systems, oil feeds, and coolant circuits, they prevent leaks by deforming slightly when tightened.
What sizes are available for these copper sealing washers?
We offer the following internal diameters for our copper crush washers to suit a wide variety of fittings:
- 6mm (M6)
- 8mm (M8)
- 10mm (M10, 3/8" UNF, 1/8" BSP)
- 11mm (7/16", AN4)
- 12mm (M12)
- 14mm (M14, AN6)
Each washer is designed to offer a secure fit for both metric and imperial hardware.
Are these copper crush washers compatible with your custom brake and clutch lines?
Yes, these copper crush washers are fully compatible with our custom stainless brake lines and clutch hoses. They’re ideal for sealing banjo bolt connections and other high-pressure hydraulic fittings.
How do I install copper crush washers correctly?
Place the copper washer between the fitting (such as a banjo bolt) and the mating surface. Tighten to the specified torque so the washer compresses slightly, forming a tight, reliable seal. Always check for leaks after installation.
Can copper crush washers be reused?
No. Copper crush washers are designed for single-use only. Once compressed, they lose their ability to reseal effectively and should be replaced to maintain a leak-free connection.