100-piece assortment includes 50 copper and 50 aluminum crush washers in 5 sizes: 10mm / 0.39in, 12mm / 0.47in, 14mm / 0.55in, 16mm / 0.63in, and 18mm / 0.71in (10 copper + 10 aluminum per size). Organized by size for easy identification. Covers virtually every vehicle on the road — from compact cars to full-size trucks, motorcycles, ATVs, and marine engines.
Includes both copper and aluminum washers for different applications. Aluminum washers are ideal for aluminum oil pans — same-metal contact eliminates galvanic corrosion. Copper washers are softer and more malleable, creating a tighter seal on cast iron and steel surfaces. Having both materials means you always have the right washer for every vehicle that comes into your shop or garage.
Crush washers are single-use components — replace at every oil change. When torqued, the soft metal deforms to fill microscopic surface imperfections between the drain plug and oil pan, creating a tight, leak-free barrier. Reusing an old crush washer is one of the most common causes of oil drips after service.
Perfect for professional shops servicing multiple vehicle brands, DIY mechanics with multiple vehicles, fleet maintenance, and powersport enthusiasts. 100 pieces means you always have the right size and material on hand — no more last-minute orders or emergency trips to the parts store. Keep this assortment in your toolbox, service bay, or garage.