{"product_id":"copper-washer-assortment-kit-m4-m14-100-piece-seal-box","title":"Copper Washer Kit M4–M14 | 100-Piece Seal Assortment Box","description":"\n\u003ch2\u003eCopper Washer \u0026amp; Seal Combination Kit — M4 to M14\u003c\/h2\u003e\n\u003cp\u003eMeet your go-to fastener solution: a 100-piece copper washer assortment covering the most common metric sizes — M4, M5, M6, M8, M10, M12, and M14 — all neatly organized in a reusable storage box. Whether you're tackling a weekend DIY project, maintaining machinery, or keeping your workshop stocked, this kit delivers the right seal every time.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose This Copper Washer Kit?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium Copper Construction:\u003c\/strong\u003e Each washer is crafted from solid copper, offering excellent corrosion resistance, reliable sealing performance, and long-lasting durability across a wide range of applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComprehensive Size Range:\u003c\/strong\u003e Seven metric sizes (M4, M5, M6, M8, M10, M12, M14) in one kit — no need to hunt for individual sizes separately.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrganized Storage Box:\u003c\/strong\u003e Comes in a segmented box that keeps every size sorted and easy to grab when you need it.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Use:\u003c\/strong\u003e Ideal for oil pan drain plugs, automotive maintenance, plumbing fittings, mechanical assemblies, and general DIY repairs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorks Right Out of the Box:\u003c\/strong\u003e Ready to use immediately — no pre-treatment or additional tools needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGreat Value:\u003c\/strong\u003e A cost-effective way to build or replenish your fastener supply with a single, well-rounded assortment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSizes Included:\u003c\/strong\u003e M4, M5, M6, M8, M10, M12, M14\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal Quantity:\u003c\/strong\u003e 100 pieces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Segmented storage box\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Oil pan plugs, plumbing, automotive, mechanical, and DIY projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor general fastener standards and guidance, visit NIST Standards Resources.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What sizes are included in this copper washer kit?\u003c\/h4\u003e\n\u003cp\u003eA: This kit includes copper washers in seven metric sizes: M4, M5, M6, M8, M10, M12, and M14, giving you comprehensive coverage for the most common fastener applications in a single organized box.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What are copper washers typically used for?\u003c\/h4\u003e\n\u003cp\u003eA: Copper washers are widely used as sealing washers for oil drain plugs, hydraulic fittings, plumbing connections, and mechanical assemblies. Their natural malleability allows them to compress and form a tight, leak-resistant seal around bolts and nuts.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many washers come in this assortment kit?\u003c\/h4\u003e\n\u003cp\u003eA: The kit contains 100 pieces total, distributed across the seven metric sizes (M4–M14), all stored in a convenient segmented box for easy access and organization.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are these washers suitable for automotive use?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — copper washers are a popular choice for automotive applications, particularly as sealing washers for oil pan drain plugs. Their durability and malleability make them well-suited for use in engines and other mechanical systems.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What sizes are included in this copper washer kit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This kit includes copper washers in seven metric sizes: M4, M5, M6, M8, M10, M12, and M14, giving you comprehensive coverage for the most common fastener applications in a single organized box.\"}}, {\"@type\": \"Question\", \"name\": \"What are copper washers typically used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Copper washers are widely used as sealing washers for oil drain plugs, hydraulic fittings, plumbing connections, and mechanical assemblies. 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