{"product_id":"black-plastic-knurled-thumb-screws-m3-m4-hand-tighten-knobs-10pcs","title":"10pcs Black Plastic Knurled Thumb Screws M3 M4 Hand Tighten Knobs","description":"\n\u003ch2\u003e10-Pack Black Plastic Knurled Thumb Screws – Easy Hand-Tightening Knobs for DIY \u0026amp; Metalworking\u003c\/h2\u003e\n\u003cp\u003eKeep your projects firmly in place without reaching for a screwdriver. These \u003cstrong\u003eblack plastic knurled thumb screws\u003c\/strong\u003e feature a textured, round knob head that gives you a confident grip for quick, tool-free adjustments. Whether you're assembling equipment panels, securing enclosures, or fine-tuning DIY builds, these hand-tighten screws make the job faster and more convenient.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Durable carbon steel core with black plastic knurled knob head — corrosion-resistant and built to last\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSizes Available:\u003c\/strong\u003e M3 \/ M4 \/ 11# — versatile sizing to suit a wide range of threading applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Style:\u003c\/strong\u003e Round knurled knob for easy, tool-free hand tightening\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScrew Type:\u003c\/strong\u003e Machine screws — compatible with standard threaded inserts and nuts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePack of 10:\u003c\/strong\u003e Generous quantity ideal for projects requiring multiple adjustment points\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE Certified:\u003c\/strong\u003e Meets quality and safety standards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomizable:\u003c\/strong\u003e Available in custom configurations to match your specific project needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJARBLUE\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLC012\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCarbon Steel with Plastic Knob\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM3, M4, 11#\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHead Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRound Knurled\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 Pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE\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\u003eGreat For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY metalworking and fabrication projects\u003c\/li\u003e\n  \u003cli\u003eElectronics enclosures and panel assemblies\u003c\/li\u003e\n  \u003cli\u003e3D printer adjustments and calibration\u003c\/li\u003e\n  \u003cli\u003eMachine guarding and equipment covers\u003c\/li\u003e\n  \u003cli\u003eWoodworking jigs and fixtures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-self-tapping-screws-m2-2-m4-8-phillips-wood-hinge\"\u003e10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-2-pin-quick-splice-spring-wire-connectors-lock-terminals\"\u003e10pcs 2-Pin Spring Wire Connectors – Quick Splice Lock Terminals\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-durable-gold-blade-nut-metal-universal-trimmer-accessories-anti-loosening-line-left-hand-thread-replacement-parts-1\"\u003e10pcs Durable Gold Blade Nut Metal Universal Trimmer Accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\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 thread sizes are available for these knurled thumb screws?\u003c\/h4\u003e\n\u003cp\u003eA: These black plastic knurled thumb screws are available in M3, M4, and 11# sizes, making them compatible with a wide variety of standard threaded holes and inserts used in metalworking, electronics, and DIY projects.\u003c\/p\u003e\n\u003ch4\u003eQ: Do I need any tools to tighten or loosen these screws?\u003c\/h4\u003e\n\u003cp\u003eA: No tools are required. The round knurled plastic knob head is specifically designed for comfortable, tool-free hand tightening and loosening — perfect for applications that need frequent adjustments.\u003c\/p\u003e\n\u003ch4\u003eQ: Are these thumb screws suitable for outdoor or high-moisture environments?\u003c\/h4\u003e\n\u003cp\u003eA: These screws are made from carbon steel with a plastic knob head. While the plastic provides some resistance, we recommend using them primarily in indoor or controlled environments to maintain the integrity of the carbon steel threads over time.\u003c\/p\u003e\n\u003ch4\u003eQ: How many pieces come in each pack?\u003c\/h4\u003e\n\u003cp\u003eA: Each pack contains 10 pieces of black plastic knurled thumb screws, giving you plenty for multi-point fastening applications or to keep spares on hand for future projects.\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 thread sizes are available for these knurled thumb screws?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These black plastic knurled thumb screws are available in M3, M4, and 11# sizes, making them compatible with a wide variety of standard threaded holes and inserts used in metalworking, electronics, and DIY projects.\"}}, {\"@type\": \"Question\", \"name\": \"Do I need any tools to tighten or loosen these screws?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No tools are required. 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