100pcs Copper Washer Assortment Kit – M4 to M14 Sealing Rings for Oil Pan, Nuts, and Bolts (With Storage Box)

Get a reliable seal and professional finish with this 100-piece Copper Washer Assortment Kit. Designed for oil pan plugs, nuts, bolts, and fluid systems, these washers deliver excellent conductivity, corrosion resistance, and leak prevention. With a range of sizes from M4 to M14, this compact set is a must-have for mechanics, engineers, and DIYers alike.

Key Features

• 100-piece copper washer kit in assorted sizes

• Covers M4, M5, M6, M8, M10, M12, M14

• Durable, corrosion-resistant copper for long-lasting sealing

• Perfect for oil plugs, engines, automotive systems, and plumbing

• Comes in a handy labeled plastic storage box

Why Choose Our 100pcs Copper Washer Assortment Kit
These washers outperform rubber or aluminum alternatives in high-heat and high-pressure conditions. They’re reusable, precision-machined, and ensure a tight, leak-free fit every time.

Perfect For

• Engine oil drain plugs

• Hydraulic or fuel line fittings

• Bolted joints requiring a soft seal

• Workshop, garage, or toolbox use

Care & Maintenance
Keep stored in the labeled box to prevent mix-ups. Clean and inspect before reuse in high-pressure applications.

Seal it right the first time—stock your bench with this essential copper washer kit and get the job done cleanly and confidently.