{"product_id":"100pcs-m3-m16-galvanized-carbon-steel-internal-serrated-lock-washers","title":"100Pcs M3–M16 Galvanized Internal Serrated Lock Washers","description":"\u003ch2\u003e100-Piece Galvanized Carbon Steel Internal Serrated Lock Washer Set\u003c\/h2\u003e\n\u003cp\u003eKeep every bolt, screw, and nut locked firmly in place with this versatile 100-piece set of internal toothed serrated lock washers. Available in sizes M3 through M16, these galvanized carbon steel washers are engineered for both professional mechanical assemblies and everyday home DIY projects. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable Anti-Loosening Performance:\u003c\/strong\u003e Precision-machined sharp serrated inner teeth bite firmly into fastener heads and mounting surfaces, preventing rotation caused by vibration or torque fluctuation — keeping your connections secure for the long haul.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExcellent Load-Bearing Capacity:\u003c\/strong\u003e High-hardness, high-toughness carbon steel withstands heavy torque and pressure without deforming, delivering stable, industrial-grade performance even under demanding mechanical stress.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong-Lasting Corrosion Resistance:\u003c\/strong\u003e A dense galvanized surface coating shields the carbon steel base from rust, moisture, and mild corrosive exposure — extending service life for both indoor and outdoor applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEffortless Installation:\u003c\/strong\u003e Standardized precision dimensions fit standard fasteners without adjustment. Serrated edges self-align during tightening, speeding up assembly whether you're on a job site or working on a weekend project.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGalvanized Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish \/ Color\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSilver (Galvanized Surface)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSizes Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM3, M4, M5, M6, M8, M10, M12, M14, M16\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 Pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIndustrial machinery assembly\u003c\/li\u003e\n  \u003cli\u003eAutomotive repair and maintenance\u003c\/li\u003e\n  \u003cli\u003eElectronic equipment installation\u003c\/li\u003e\n  \u003cli\u003eFurniture and cabinetry assembly\u003c\/li\u003e\n  \u003cli\u003eHome DIY improvement projects and woodworking\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/3-jaw-keyless-ratchet-drill-chuck-0-8-10mm-self-locking\"\u003e3-Jaw Keyless Ratchet Drill Chuck 0.8–10mm Self-Locking\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/rotary-hidden-furniture-hinge-folding-door-hardware-pair\"\u003eRotary Hidden Furniture Hinge Folding Door Hardware 1 Pair\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/pu-leather-welding-sleeves-heat-resistant-arm-guards\"\u003ePU Leather Welding Sleeves – Heat Resistant Arm Guards 1 Pair\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Photos are for illustrative purposes only and may not reflect actual size or exact color. Please refer to the specifications table for dimensions. Minor measurement differences may occur due to manual measurement processes.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What sizes are included in this 100-piece serrated lock washer set?\u003c\/h4\u003e\n\u003cp\u003eA: The set includes internal toothed lock washers in sizes M3, M4, M5, M6, M8, M10, M12, M14, and M16, covering a wide range of standard fastener sizes for both light-duty and heavy-duty applications.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the difference between internal and external serrated lock washers?\u003c\/h4\u003e\n\u003cp\u003eA: Internal serrated lock washers (like these) have teeth on the inner edge that grip the fastener shaft directly, making them ideal for use under bolt heads or nuts where a cleaner outer appearance is desired. External serrated washers have teeth on the outer edge for a wider grip footprint.\u003c\/p\u003e\n\u003ch4\u003eQ: Are these galvanized lock washers suitable for outdoor use?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The galvanized surface treatment forms a protective zinc layer over the carbon steel base, providing solid resistance to rust, moisture, and mild corrosion — making these washers well-suited for both indoor assemblies and outdoor applications.\u003c\/p\u003e\n\u003ch4\u003eQ: How many washers of each size are included?\u003c\/h4\u003e\n\u003cp\u003eA: The 100-piece set is distributed across the nine available sizes (M3–M16). Please refer to the product images for the exact per-size breakdown, as quantities per size may vary.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What sizes are included in this 100-piece serrated lock washer set?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The set includes internal toothed lock washers in sizes M3, M4, M5, M6, M8, M10, M12, M14, and M16, covering a wide range of standard fastener sizes for both light-duty and heavy-duty applications.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between internal and external serrated lock washers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Internal serrated lock washers (like these) have teeth on the inner edge that grip the fastener shaft directly, making them ideal for use under bolt heads or nuts where a cleaner outer appearance is desired. External serrated washers have teeth on the outer edge for a wider grip footprint.\"}}, {\"@type\": \"Question\", \"name\": \"Are these galvanized lock washers suitable for outdoor use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The galvanized surface treatment forms a protective zinc layer over the carbon steel base, providing solid resistance to rust, moisture, and mild corrosion — making these washers well-suited for both indoor assemblies and outdoor applications.\"}}, {\"@type\": \"Question\", \"name\": \"How many washers of each size are included?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 100-piece set is distributed across the nine available sizes (M3–M16). Please refer to the product images for the exact per-size breakdown, as quantities per size may vary.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/akv9zi-87.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/akv9zi-87.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"100Pcs M3–M16 Galvanized Internal Serrated Lock Washers\", \"item\": \"https:\/\/akv9zi-87.myshopify.com\/products\/100pcs-m3-m16-galvanized-carbon-steel-internal-serrated-lock-washers\"}]}\u003c\/script\u003e","brand":"PRIMED","offers":[{"title":"M5 100Pcs","offer_id":41455323807808,"sku":"14:365462#M5 100Pcs","price":3.49,"currency_code":"USD","in_stock":true},{"title":"M6 100Pcs","offer_id":41455323840576,"sku":"14:366#M6 100Pcs","price":3.49,"currency_code":"USD","in_stock":true},{"title":"M3 100Pcs","offer_id":41455323873344,"sku":"14:193#M3 100Pcs","price":3.49,"currency_code":"USD","in_stock":true},{"title":"M4 100Pcs","offer_id":41455323906112,"sku":"14:29#M4 100Pcs","price":3.49,"currency_code":"USD","in_stock":true},{"title":"M12 100Pcs","offer_id":41455323938880,"sku":"14:100010417#M12 100Pcs","price":4.65,"currency_code":"USD","in_stock":true},{"title":"M14 100Pcs","offer_id":41455323971648,"sku":"14:496#M14 100Pcs","price":6.26,"currency_code":"USD","in_stock":true},{"title":"M8 100Pcs","offer_id":41455324004416,"sku":"14:200025551#M8 100Pcs","price":3.79,"currency_code":"USD","in_stock":true},{"title":"M10 100Pcs","offer_id":41455324037184,"sku":"14:175#M10 100Pcs","price":4.65,"currency_code":"USD","in_stock":true},{"title":"M16 100Pcs","offer_id":41455324069952,"sku":"14:203486355#M16 100Pcs","price":10.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0614\/2948\/1536\/files\/Sa859bd1073364ae281c2ea0d3876c952N.webp?v=1792765783","url":"https:\/\/primedgoods.com\/products\/100pcs-m3-m16-galvanized-carbon-steel-internal-serrated-lock-washers","provider":"PRIMED","version":"1.0","type":"link"}