{"product_id":"spi-34-348-3-plug-thread-gage-3-48-3b-double-end-go-no-go","title":"Spi 34-348-3 Plug Thread Gage 3-48 3B Double End Go No Go","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 34-348-3 is a double-end plug thread gage used to inspect 3-48 unified national thread forms to Class 3B tolerance standards. One end carries the Go member and the opposite end carries the No Go member, allowing a technician to confirm both minimum material condition and maximum material condition in a single tool. The gage is manufactured from steel and ships with a handle included. NIST traceability certification is included, supporting quality-system documentation requirements in production and inspection environments. Machinists, quality technicians, and tool-room inspectors rely on plug thread gages like this one for in-process and final inspection of tapped holes.\u003c\/p\u003e\n\u003cp\u003eThis gage is suited for inspecting fine-pitch, small-diameter threaded holes — specifically the 3-48 thread size common in instrument components, small fastener assemblies, and precision mechanical subassemblies. The Class 3B designation applies to internal threads requiring a tight tolerance fit, making this gage appropriate for aerospace, electronics, and precision machining applications where thread fit is critical to function.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-end design: Go and No Go members on a single gage body for efficient inspection\u003c\/li\u003e\n  \u003cli\u003e3-48 thread size with Class 3B tolerance classification for tight-fit internal thread inspection\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability in production and tool-room environments\u003c\/li\u003e\n  \u003cli\u003eHandle included — no separate handle purchase required\u003c\/li\u003e\n  \u003cli\u003eNIST traceability certification included to support ISO and quality-system recordkeeping\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for inspection of 3-48 Class 3B internal (tapped) threads in accordance with NIST standards. Suitable for use wherever Go\/No Go plug thread gaging of this thread form is required.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003ePlug thread gages are inspection tools, not cutting tools — never force the gage into a tapped hole or apply torque beyond hand pressure. The Go member should pass through the full thread length under hand pressure; the No Go member should not enter more than two turns. Store the gage in a protective case away from abrasives and temperature extremes to preserve calibration integrity. Periodic recalibration against NIST-traceable standards is recommended per your facility quality plan.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3-48\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Class\u003c\/strong\u003e: 3B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGage Type\u003c\/strong\u003e: Go \/ 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: 34-348-3\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51699602620722,"sku":"34-348-3","price":211.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ba38c36a608deab0dc71300c8992b821.jpg?v=1788378092","url":"https:\/\/voomisupply.com\/products\/spi-34-348-3-plug-thread-gage-3-48-3b-double-end-go-no-go","provider":"Voomi Supply","version":"1.0","type":"link"}