{"product_id":"spi-34-398-8-plug-thread-gage-7-16-28-3b-go-no-go","title":"Spi 34-398-8 Plug Thread Gage 7\/16-28 3B Go No Go","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 34-398-8 is a double-end plug thread gage used to verify internal thread conformance to 7\/16-28 thread specifications at 3B class tolerance. One end is the Go member; the other is the No Go member. The Go end must pass fully through a conforming threaded hole. The No Go end must not enter beyond the first turn. Handle is included. The gage is made from steel and ships with NIST traceability certification, making it suitable for use in quality-control environments where documented standards compliance is required. Machinists, tool-and-die technicians, and QC inspectors use this type of gage for incoming inspection, in-process verification, and final acceptance of threaded bores.\u003c\/p\u003e\u003cp\u003eThis gage is designed for checking 7\/16-28 unified national fine (UNF) internal threads to 3B class tolerances. The 3B classification defines a standard commercial tolerance range widely used in general-purpose mechanical assemblies. A handle size 2 is included, which is the standard handle diameter for gages in this thread-size range. This tool is appropriate for use in machine shops, manufacturing facilities, and quality labs that require NIST-traceable inspection tooling.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDouble-end design with Go and No Go members on a single gage body\u003c\/li\u003e\n\u003cli\u003e7\/16-28 thread size for unified national fine thread inspection\u003c\/li\u003e\n\u003cli\u003e3B class tolerance for standard commercial-fit verification\u003c\/li\u003e\n\u003cli\u003eSteel construction for durability and dimensional stability\u003c\/li\u003e\n\u003cli\u003eIncludes handle size 2 — no separate purchase required\u003c\/li\u003e\n\u003cli\u003eNIST traceability certification included for documented quality programs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for inspection of 7\/16-28 internal threads manufactured to 3B class tolerance per NIST-recognized standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread gages require no installation. Store the gage in its case when not in use to protect the gage members from damage or contamination. Apply a light coat of clean instrument oil before and after use to prevent corrosion on the steel members. Calibration interval should be established based on frequency of use and the quality program requirements of the facility.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/16-28\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass\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 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\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: 34-398-8\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51713977450802,"sku":"34-398-8","price":335.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f49bc853ec6e26040c34be6b24b834eb.jpg?v=1788495802","url":"https:\/\/voomisupply.com\/products\/spi-34-398-8-plug-thread-gage-7-16-28-3b-go-no-go","provider":"Voomi Supply","version":"1.0","type":"link"}