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

Seamaka 360PCS Crush Washer Oil Drain Plug kit is a complete assortment of copper gaskets in 18 metric sizes designed to seal oil drain plugs, prevent leaks, and simplify routine maintenance.

This kit gathers 360 precision-cut copper crush washers sized from M6 through M24 into a transparent, labeled storage box so you can identify and retrieve the correct oil pan drain plug gasket quickly. Each washer is made from corrosion-resistant copper that conforms to mating surfaces when tightened, creating a reliable metal-to-metal seal suitable for automotive, marine, and industrial fittings.

Which sizes are included and how many of each will I get?

The assortment covers common drain-plug thread sizes so you’re likely to have the right gasket on hand for most cars, motorcycles, trucks and small engines. Counts are allocated to match typical repair frequency while still providing plenty of spares.

• M6: 80 pieces
• M8: 80 pieces
• M10: 70 pieces
• M12: 40 pieces
• M14: 25 pieces
• M16: 20 pieces
• M18: 20 pieces
• M20: 10 pieces
• M22: 10 pieces
• M24: 5 pieces

How does copper perform compared with other gasket materials?

Copper offers a balance of malleability and durability, allowing the washer to deform slightly under bolt torque and fill surface irregularities to form a tight seal. It resists oxidation and handles temperature swings better than softer materials, making it a solid choice for oil drain and hydraulic fittings.

• Metal-to-metal sealing that tolerates heat and oil exposure
• Less likely to compress permanently compared to soft alloys
• Good corrosion resistance for long service life

What makes the Seamaka kit easy to use during maintenance?

The washers arrive sorted inside a clear plastic case with size labels so you can visually confirm the correct diameter before installation. The variety means fewer trips to the store and a faster oil change or repair because you can match the washer directly to the drain plug or fitting.

• Transparent compartment box for quick size identification
• Labeled sections reduce selection errors during service
• Large quantity of common sizes keeps spares on hand

Will these crush washers work for applications beyond engine oil drains?

Yes—copper washers are commonly used across many sealing tasks where a metal gasket is preferred, including hydraulic connectors, fuel and oil lines, and electrical grounding where a conductive seal is helpful. Always match washer size and thickness to the specific fitting and service conditions.

• Suitable for hydraulic fittings and oil supply lines
• Can be used in marine and appliance applications exposed to oil
• Useful as conductive sealing washers for electrical connections

Who is this for? Mechanics, DIY enthusiasts, fleet operators, and hobbyists who perform regular oil changes or service hydraulic fittings will find this Seamaka kit convenient. The broad size range and large counts suit garages that handle multiple vehicle types, as well as home users who want to keep a dependable stock of copper drain plug gaskets on hand.