300-Piece Copper Washer Assortment Kit (M5–M20) – Flat Ring Seals for Automotive, Plumbing, and Industrial Applications

The 300-Piece Copper Washer & Gasket Assortment Kit provides a complete selection of precision-engineered copper flat washers, designed to create tight, leak-free seals for a wide range of mechanical, automotive, and plumbing applications.

Crafted from high-quality copper, these washers deliver excellent corrosion resistance, conductivity, and durability. Each washer is organised by size in a sturdy plastic case for easy access and portability.

Set Includes (by Size & Quantity):

• M5 × 9 × 1 mm — 30 pcs

• M6 × 10 × 1 mm — 30 pcs

• M6 × 12 × 1 mm — 30 pcs

• M8 × 12 × 1 mm — 30 pcs

• M8 × 14 × 1 mm — 30 pcs

• M10 × 14 × 1 mm — 30 pcs

• M12 × 16 × 1 mm — 25 pcs

• M12 × 18 × 1.5 mm — 20 pcs

• M14 × 20 × 1 mm — 25 pcs

• M16 × 22 × 1 mm — 20 pcs

• M16 × 22 × 1.5 mm — 15 pcs

• M20 × 26 × 1.5 mm — 15 pcs

Total: 300 Pieces

Features

• ✅ Precision Sizes: Covers the most common M5–M20 applications

• 🔩 Premium Copper: Corrosion-resistant and durable under heat and pressure

• 🧰 Versatile Applications: Perfect for sealing hydraulic, fuel, brake, oil, and air fittings

• 🚗 Organised Storage Box: Each size clearly labelled for quick identification

• ⚙️ Ideal For: Automotive repair, plumbing, HVAC maintenance, and general workshop use

Specifications

• Material: Copper

• Quantity: 300 pieces

• Range: M5–M20

• Packaging: Hard plastic storage case