maierke 360PCS Crush Washer Oil Drain Plug,18 Sizes Copper

maierke 360PCS Crush Washer Oil Drain Plug assortment is a complete copper gasket kit with 18 sizes (M6–M24) designed to seal oil drain plugs, hydraulic fittings, and other threaded connections reliably.

If you service cars, motorcycles, trucks, boats, or hydraulic equipment, having a full set of copper crush washers saves time and prevents leaks during oil changes and maintenance. This maierke kit includes 360 copper washers in 18 common metric sizes, organized in a labeled plastic storage case so you can quickly find the right diameter while working in a garage or on the road.

How does this copper crush washer kit improve sealing during oil changes?

Copper crush washers deform slightly when tightened, filling surface imperfections between the drain plug and oil pan. The metal-to-metal contact resists high temperatures and oil exposure better than many non-metallic gaskets, helping maintain a secure seal under load.

• Made from corrosion-resistant copper for durable metal seals
• Multiple sizes (M6–M24) to fit a wide range of drain plugs and fittings
• Crush design creates a conforming seal that compensates for minor surface irregularities

Which sizes are included and how is the kit organized?

The set contains 360 copper washers across 18 metric sizes, covering many common automotive, motorcycle, and marine drain plug threads. Each size is separated into compartments inside a labeled plastic box so you can identify and access the correct washer quickly during maintenance.

• 18 sizes spanning M6, M8, M10, M12, M14, M16, M18, M20, M22 and M24 among others
• 360 total pieces to cover repeated service intervals and multiple vehicles
• Clear, compartmentalized storage case labeled for fast selection and inventory

Will these copper washers work for applications beyond oil drain plugs?

Yes. Copper crush washers are widely used for sealing hydraulic fittings, brake lines, fuel systems, and electrical connection interfaces where a soft metal seal is preferred. Their resistance to oxidation and temperature changes makes them suitable for automotive, marine, and light industrial use.

• Suitable for oil pans, hydraulic lines, and fuel or brake fittings where metal seals are required
• Works in high-temperature and high-humidity environments without rapid degradation
• Also useful for household appliances and small commercial machines needing reliable gaskets

How should I choose and install the correct crush washer for my drain plug?

Select the washer that matches the drain plug’s nominal metric size and fits snugly around the plug shaft. During installation, tighten to the vehicle or component manufacturer’s torque specification so the copper deforms to form the seal without over-compressing.

• Select size by matching plug diameter or trying sizes from the labeled kit compartment
• Replace the washer at each oil change for a consistent seal and to prevent leaks
• Tighten to recommended torque—copper should crush, not shear, for an effective seal

Who is this for: The maierke 360PCS Copper Crush Washer kit is aimed at DIY mechanics, professional technicians, fleet maintenance teams, and boat owners who need a broad range of reliable metal gaskets. If you perform routine oil changes, service hydraulic systems, or maintain multiple vehicles and want an organized set of durable copper washers, this kit provides the sizes and storage to keep maintenance fast, accurate, and leak-free.