{"product_id":"spi-34-352-5-plug-thread-gage-4-40-3b-double-end-go-no-go","title":"Spi 34-352-5 Plug Thread Gage 4-40 3B Double End Go No Go","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 34-352-5 is a double-end plug thread gage designed to inspect 4-40 unified coarse internal threads to ASME 3B tolerance class. One end carries the Go member; the opposite end carries the No Go member, allowing a technician to verify both minimum and maximum thread tolerance in a single tool. The gage is machined from steel for wear resistance and dimensional stability under repeated use. A handle is included. Traceability is backed by NIST certification, making this gage suitable for quality-control documentation in production and inspection environments.\u003c\/p\u003e\n\u003cp\u003eThis gage is used wherever 4-40 threaded holes must be verified for conformance to 3B class tolerances. Typical applications include incoming inspection of threaded fastener seats, in-process verification on CNC-machined components, and final inspection before assembly. The compact double-end format is well suited to bench inspection stations in machine shops, electronics manufacturing, aerospace sub-assembly, and precision instrument production. Any machinist, quality technician, or metrologist working to thread tolerance standards will find this tool appropriate for their workflow.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-end design combines Go and No Go members in one tool for efficient thread verification\u003c\/li\u003e\n  \u003cli\u003eCalibrated to 4-40 thread size at ASME 3B tolerance class\u003c\/li\u003e\n  \u003cli\u003eSteel construction provides durability and dimensional stability over extended use cycles\u003c\/li\u003e\n  \u003cli\u003eNIST traceable certification included for quality-system documentation and audit compliance\u003c\/li\u003e\n  \u003cli\u003eHandle included — ready to use out of the box with no additional accessories required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for inspection of 4-40 unified coarse internal threads conforming to 3B class tolerances per ASME standards. Suitable for any threaded hole application requiring Go and No Go verification at this thread specification.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread gages are inspection tools, not cutting tools — never force the Go member through a hole or apply torque to advance it past resistance. The Go member should pass through a conforming thread under hand pressure only; the No Go member should not enter a conforming thread. Clean and lightly oil the gage after each use to prevent corrosion. Store in a protective case away from impact hazards to preserve calibration.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance Class\u003c\/strong\u003e: 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGage Type\u003c\/strong\u003e: Go and No Go\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 Included\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTraceability Certification\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: 34-352-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51703263494450,"sku":"34-352-5","price":221.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b8d6e7bfceb3efab5c91131bd09608f5.jpg?v=1788415670","url":"https:\/\/voomisupply.com\/products\/spi-34-352-5-plug-thread-gage-4-40-3b-double-end-go-no-go","provider":"Voomi Supply","version":"1.0","type":"link"}