$16.83 USD $12.95 USD SAVE 23%

QTY: 100PCS/Set

100PCS/Set
200PCS/Set

Description

Premium Copper Flat Washer Assortment Kit

The essential toolkit for mechanics and DIY enthusiasts. Ensure airtight seals, secure fastening, and reliable electrical connections with our high-purity copper washers.

Corrosion Resistant High Conductivity Organized Case

Built to Last with Pure Copper

Crafted from premium-grade copper, these washers offer superior durability compared to standard steel options. The material is naturally resistant to rust and corrosion, making it perfect for automotive engines and outdoor machinery.

Each washer features a smooth, polished surface that reduces friction during installation. This precision finish ensures a tight seal against fluid leaks while preventing damage to your bolt threads or contact surfaces.

Versatile Performance: Mechanical & Electrical

This kit isn't just for holding things together. The excellent conductivity of copper makes these washers ideal for grounding points in electrical systems and battery terminals.

  • Mechanical: Distributes pressure evenly to prevent loosening caused by vibration.
  • Sealing: Soft enough to crush slightly under torque, filling microscopic gaps to stop oil or water leaks.
  • Electrical: Maintains a strong connection between components.

Ready for Any Workshop Task

Whether you are changing engine oil, repairing a motorcycle, or assembling heavy-duty equipment, having the right size on hand saves time. The included clear plastic case keeps every size separated and easy to find.

No more digging through messy bins—the transparent lid allows you to check stock levels instantly, while the durable box protects your hardware from dust and moisture when not in use.

Wide Range of Applications

Designed to meet professional standards, this assortment kit is suitable for various industries including:

  • Automotive maintenance (Oil pan plugs, drain bolts)
  • Plumbing and hydraulic fittings
  • Industrial machinery assembly
  • DIY home improvement projects

Size Selection Guide

We offer two convenient pack sizes to match your needs. Please verify your bolt thread diameter before purchasing.

Set Option Included Sizes (ID x OD x Thickness)
   
100 PCS Set/200 PCS Set M5 (5x9mm), M6 (6x10mm), M6 (6x12mm),
M8 (8x12mm), M8 (8x14mm), M10 (10x14mm),
M12 (12x16mm), M12 (12x18mm), M14 (14x18mm)

*Dimensions are listed as Inner Diameter x Outer Diameter x Thickness (mm). All washers have a thickness of approximately 1mm unless noted otherwise.

Frequently Asked Questions

Are these washers magnetic?
No, pure copper is non-magnetic. This is a good way to verify the quality of the material if you have a magnet handy.
Can I reuse these copper washers?
It is generally recommended to use them once. Because they work by deforming slightly to create a seal, reusing them may result in a less effective seal and potential leaks.
What does "M5" mean in the size description?
"M5" refers to the metric thread size of the bolt. It means the inner diameter of the washer is approximately 5mm, designed to fit an M4 bolt shaft.
Do these come in a hard case or soft bag?
They come in a durable, clear plastic storage case with individual compartments to keep the different sizes organized and protected.