{"product_id":"spi-34-375-6-plug-thread-gage-1-4-20-2b-double-end","title":"Spi 34-375-6 Plug Thread Gage 1\/4-20 2B Double End","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 34-375-6 is a double-end plug thread gage designed to verify internal thread conformance to 1\/4-20 UNC specifications at 2B tolerance class. One end carries the Go member; the opposite end carries the No Go member. The Go end confirms the thread falls within the minimum material condition, while the No Go end confirms it does not exceed the maximum material condition. A size 1 handle is included. This gage is used by machinists, quality control inspectors, and precision tradespeople to ensure threaded holes meet dimensional standards before assembly or final inspection.\u003c\/p\u003e\n\u003cp\u003eThis gage is suited for inspection of 1\/4-20 internally threaded workpieces in manufacturing, fabrication, and quality assurance environments. The double-end configuration allows both Go and No Go checks without switching tools, reducing inspection time on production floors or field verification tasks. The included NIST-traceable certification supports use in regulated or contract manufacturing settings where documentation of measurement traceability is required.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-end design combines Go and No Go gages in a single tool\u003c\/li\u003e\n  \u003cli\u003eChecks 1\/4-20 UNC internal threads to 2B tolerance class\u003c\/li\u003e\n  \u003cli\u003eNIST-traceable traceability certification included\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability and dimensional stability\u003c\/li\u003e\n  \u003cli\u003eSize 1 handle included — no separate handle purchase required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for inspection of 1\/4-20 UNC internally threaded holes conforming to 2B class tolerance.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread plug gages are inspection tools, not cutting tools — do not force the Go end into a threaded hole. A correctly formed thread should accept the Go end with hand pressure only. Keep gages clean and lightly oiled when stored to prevent corrosion that could affect calibration. Periodic recalibration against a certified reference standard is recommended in high-volume or regulated inspection environments.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance Class\u003c\/strong\u003e: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGage Type\u003c\/strong\u003e: Go \/ No Go\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration\u003c\/strong\u003e: Double End\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandle Size\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHandle Included\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTraceability Standard\u003c\/strong\u003e: NIST\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\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 34-375-6\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51690680385842,"sku":"34-375-6","price":159.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3cf8c02548e9d704082100f44afa7646.jpg?v=1788273869","url":"https:\/\/voomisupply.com\/products\/spi-34-375-6-plug-thread-gage-1-4-20-2b-double-end","provider":"Voomi Supply","version":"1.0","type":"link"}