{"product_id":"spi-34-387-1-plug-thread-gage-3-8-16-2b-double-end","title":"Spi 34-387-1 Plug Thread Gage 3\/8-16 2B Double End","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 34-387-1 is a double-end plug thread gage used to verify the accuracy of internal 3\/8-16 UNC threads to the 2B tolerance class. One end carries the Go member and the opposite end carries the No Go member, allowing a technician to confirm both minimum and maximum thread acceptance in a single tool. The gage is manufactured from steel and ships with a size 2 handle included. A NIST-traceable calibration certificate is included, making this gage suitable for use in quality-controlled production and inspection environments. Machinists, toolroom technicians, and quality control inspectors use this gage as part of standard thread-inspection protocol.\u003c\/p\u003e\u003cp\u003eThis gage applies wherever 3\/8-16 internal threads must be verified to ANSI 2B standards. Typical applications include incoming inspection of threaded fastener holes, in-process verification on CNC and manual machining operations, and final inspection before assembly. The double-end design reduces the number of tools required at the inspection station and speeds the go\/no-go decision. The included handle is sized to match the gage members, providing consistent grip and feel during inspection cycles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eGo and No Go members on a single double-end gage — complete 2B thread inspection in one tool\u003c\/li\u003e\n\u003cli\u003e3\/8-16 UNC thread size with 2B tolerance classification\u003c\/li\u003e\n\u003cli\u003eSteel construction for durability in shop environments\u003c\/li\u003e\n\u003cli\u003eSize 2 handle included — no separate handle purchase required\u003c\/li\u003e\n\u003cli\u003eNIST-traceable traceability certification included for quality system documentation\u003c\/li\u003e\n\u003cli\u003eMeets NIST standards for dimensional inspection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for inspection of internal 3\/8-16 UNC threads held to the 2B tolerance class in accordance with ANSI unified thread standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread gages are inspection instruments, not cutting tools — never force the Go member through a thread or apply rotational torque beyond hand pressure. The No Go member should not enter the threaded hole by more than two turns; entry beyond that indicates the thread is out of tolerance. Handle the gage carefully to avoid nicks or corrosion that could affect calibration. Store in the provided case or a protected location, and re-certify on a schedule consistent with 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: 3\/8-16\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 Plug Thread Gage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Configuration\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: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Included\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraceability Certification\u003c\/strong\u003e: NIST-traceable certificate included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: NIST\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: 34-387-1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51700738851122,"sku":"34-387-1","price":160.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/96aa95c48295ae10076ad85904da1a14.jpg?v=1788394595","url":"https:\/\/voomisupply.com\/products\/spi-34-387-1-plug-thread-gage-3-8-16-2b-double-end","provider":"Voomi Supply","version":"1.0","type":"link"}