{"product_id":"spi-34-490-3-threaded-ring-gage-m12x1-75-class-6g-no-go","title":"Spi 34-490-3 Threaded Ring Gage M12x1.75 Class 6G No Go","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 34-490-3 is a No Go threaded ring gage used to verify the upper tolerance limit of external metric threads. Manufactured from Oil Hardened Non-Shrinking Steel (OHNS), this single-ring gage is designed for M12 x 1.75 metric threads and is classified to Class 6G tolerances. It ships with an NPL Traceability Certification, confirming the gage meets traceable calibration standards. Machinists, quality technicians, and tool-room professionals use No Go gages to confirm that a threaded workpiece does not exceed the maximum material condition — meaning the gage must not fully thread onto the part to constitute a passing result.\u003c\/p\u003e\u003cp\u003eThis gage is suited for production inspection environments, tool rooms, and quality control stations where metric external threads must be verified to Class 6G specifications. Class 6G is the standard general-purpose fit for metric fastener threads and is widely applied across manufacturing, machining, and assembly operations. The M12 x 1.75 thread size is common in automotive, heavy equipment, and industrial machinery applications, making this gage a frequently used reference instrument in those environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eNo Go ring gage confirms external threads do not exceed Class 6G upper tolerance limit\u003c\/li\u003e\n\u003cli\u003eM12 x 1.75 metric thread form, single-ring design\u003c\/li\u003e\n\u003cli\u003eConstructed from Oil Hardened Non-Shrinking Steel (OHNS) for dimensional stability and wear resistance\u003c\/li\u003e\n\u003cli\u003eNPL Traceability Certification included for calibration documentation requirements\u003c\/li\u003e\n\u003cli\u003eSingle-ring configuration for dedicated No Go inspection use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for inspection of M12 x 1.75 external metric threads to Class 6G tolerance classification. Use in conjunction with a matching Class 6G Go threaded ring gage to complete a full pass\/fail thread inspection.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThreaded ring gages are inspection instruments and do not require mechanical installation. Handle with clean, dry hands or lint-free gloves to prevent corrosion and dimensional contamination. Store in a protective case away from temperature extremes to maintain calibration integrity. Periodic recalibration against traceable standards is recommended per your quality management system requirements.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M12 x 1.75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Metric\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassification\u003c\/strong\u003e: Class 6G\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGage Type\u003c\/strong\u003e: No Go\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Configuration\u003c\/strong\u003e: Single Ring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Oil Hardened Non-Shrinking Steel (OHNS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraceability Standard\u003c\/strong\u003e: NPL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraceability Certification\u003c\/strong\u003e: Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 41111619\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 34-490-3\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51697396285746,"sku":"34-490-3","price":271.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/93277158c60f6f5f8eeb278777d8f489.jpg?v=1788351235","url":"https:\/\/voomisupply.com\/products\/spi-34-490-3-threaded-ring-gage-m12x1-75-class-6g-no-go","provider":"Voomi Supply","version":"1.0","type":"link"}