{"product_id":"bolt-nut-thread-checker-gauge-standard-metric-26-piece","title":"ATUOTIN 26-Piece Bolt \u0026 Nut Thread Checker Gauge – Standard \u0026 Metric","description":"\n\u003ch2\u003eATUOTIN 26-Piece Bolt \u0026amp; Nut Thread Identifier Gauge – Standard \u0026amp; Metric\u003c\/h2\u003e\n\u003cp\u003eNever guess a bolt size again. The \u003cstrong\u003eATUOTIN Bolt \u0026amp; Nut Thread Checker\u003c\/strong\u003e gives you instant, accurate thread identification across 26 standard and metric sizes — all in one compact, ring-mounted set. Whether you're working on a home repair, metalworking project, or shop maintenance task, this thread gauge keeps your workflow fast and error-free.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e26 Male \u0026amp; Female Thread Gauges:\u003c\/strong\u003e Covers metric threads from M4×0.7 to M12×1.75 and standard (UNC\/UNF) threads from #6-32 to 1\/2-20, giving you a truly universal fit for the most common fastener sizes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Speed Steel Construction:\u003c\/strong\u003e Built from durable, rust-resistant high-speed steel so the gauge stands up to demanding shop environments and repeated daily use without losing accuracy.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePermanent Etched Markings:\u003c\/strong\u003e Every gauge leaf features laser-etched size identifiers — they won't fade, rub off, or wear away, ensuring quick and reliable thread recognition job after job.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRotating Ring Design:\u003c\/strong\u003e All 26 gauges pivot freely on a sturdy metal ring for smooth, one-handed operation. The ring keeps every piece together so nothing gets lost in the toolbox.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise \u0026amp; Efficient:\u003c\/strong\u003e Quickly verify thread pitch and dimension on nuts and bolts before assembly — eliminate costly measurement errors and save valuable time on every project.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-Speed Steel (Metal)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of Gauges\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e26 (Male \u0026amp; Female)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMetric Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM4×0.7 to M12×1.75\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e#6-32 to 1\/2-20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e155 × 150 × 20 mm (6.1 × 5.91 × 0.79 in)\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 China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × ATUOTIN Nut \u0026amp; Bolt Thread Checker (26-piece gauge set on ring)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Due to variations in monitor settings and lighting, actual color may differ slightly from product images. Please allow a 1–2 cm tolerance due to manual measurement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eFor more information on fastener standards and thread specifications, visit the NIST Standards Resource Center.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eQ: What thread sizes does the ATUOTIN bolt and nut thread checker cover?\u003c\/h4\u003e\n\u003cp\u003eA: The set includes 26 male and female thread gauges covering metric sizes from M4×0.7 to M12×1.75 and standard (UNC\/UNF) sizes from #6-32 to 1\/2-20 — the most commonly used fastener thread sizes for home and professional use.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this thread gauge set suitable for both professional mechanics and home DIY users?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The ATUOTIN thread checker is crafted from rust-resistant high-speed steel with permanent etched markings, making it durable enough for professional metalworking shops while remaining lightweight and easy to use for everyday home repairs.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I use the bolt and nut thread identifier gauge?\u003c\/h4\u003e\n\u003cp\u003eA: Simply fan out the individual gauge leaves from the ring, and test-fit the male or female gauge against your bolt or nut threads. When a gauge slides on cleanly without slop or binding, you've found the correct thread size and pitch. The etched label on each leaf instantly tells you the size.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Will the size markings fade or wear off over time?\u003c\/h4\u003e\n\u003cp\u003eA: No. The size identifiers are laser-etched directly into the high-speed steel — not printed or painted — so they remain permanently legible even after years of heavy use in a workshop environment.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What thread sizes does the ATUOTIN bolt and nut thread checker cover?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The set includes 26 male and female thread gauges covering metric sizes from M4×0.7 to M12×1.75 and standard (UNC\/UNF) sizes from #6-32 to 1\/2-20 — the most commonly used fastener thread sizes for home and professional use.\"}}, {\"@type\": \"Question\", \"name\": \"Is this thread gauge set suitable for both professional mechanics and home DIY users?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. 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