AUTOMAJOR 100-Pack Oil Drain Plug Crush Washer Kit — 10–18mm, Copper & Aluminum, Universal Fit

Versatile, ready-to-use oil drain plug crush washer kit

The AUTOMAJOR 100-piece Crush Washer Assortment combines copper and aluminum seals in a single, organized set. With 50 copper and 50 aluminum washers across five common sizes, this kit is designed to fit a broad range of vehicles and powersport equipment. Each size includes 10 copper and 10 aluminum washers: 10mm, 12mm, 14mm, 16mm, and 18mm.

Why two materials matter

Copper washers are softer and excel at sealing on cast iron and steel surfaces, while aluminum washers offer compatibility with aluminum oil pans and help prevent galvanic issues. Having both materials on hand lets you tailor the seal to the job and vehicle.

What’s inside and how it helps

• 100-piece assortment: 50 copper and 50 aluminum washers in five sizes (10mm–18mm).
• Size-by-size organization makes selection quick and minimizes guesswork during service.
• Designed for broad compatibility, including many mainstream cars, trucks, and select motorcycles.

• Single-use, replace-at-every-oil-change crush washers help minimize drips and resealing issues.
• The kit is suitable for professional shops, DIY enthusiasts, fleets, and powersport hobbyists.
• Compact storage supports easy toolbox or service-bay organization.

Tip: before an oil change, confirm the drain plug thread size and vehicle model to ensure the best fit. Keeping a complete kit on hand minimizes last-minute trips to the parts store and supports a smooth maintenance workflow.

In practice, technicians appreciate having five sizes in two materials ready for mixed fleets. If you work on Toyota, Honda, BMW, Subaru, Mazda, or select motorcycles, this set increases the odds of a proper seal on the first try. The combination works well across aluminum and steel oil pans, helping you adapt to different maintenance scenarios without clutter.