{"product_id":"spi-29-842-2-class-zz-plus-plug-gage-0-842-in","title":"Spi 29-842-2 Class Zz Plus Plug Gage 0.842 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 29-842-2 is a Class ZZ Plus plug gage designed for precision hole inspection in machining, manufacturing, and quality-control environments. It measures bore diameters at 0.842 inches with a tolerance of 0.0002 inches, making it suitable for go\/no-go verification of close-tolerance bores. The gage is machined from steel for durability and dimensional stability under repeated use. Machinists, tool-and-die makers, and quality inspectors use plug gages like this one to confirm that drilled, reamed, or bored holes fall within specified dimensional limits before parts advance to assembly.\u003c\/p\u003e\n\u003cp\u003eThis plug gage is used in production and inspection settings where hole-diameter verification is required at 0.842 inches nominal. It is appropriate for both floor-level inspection at the machine and dedicated quality-control stations. Class ZZ Plus designation indicates the gage meets industry tolerance standards for workshop-grade plug gages used in general manufacturing inspection. The compact form factor and 0.2-pound weight make it easy to handle during repetitive inspection cycles.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0.842-inch nominal diameter for direct bore verification at that size\u003c\/li\u003e\n  \u003cli\u003e0.0002-inch tolerance meets Class ZZ Plus gage-accuracy requirements\u003c\/li\u003e\n  \u003cli\u003eSteel construction provides wear resistance and dimensional stability\u003c\/li\u003e\n  \u003cli\u003eLightweight at 0.2 pounds for comfortable single-hand use\u003c\/li\u003e\n  \u003cli\u003eGo\/no-go inspection method reduces operator subjectivity in pass-fail decisions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-use plug gage for any application requiring inspection of 0.842-inch nominal diameter bores in steel, aluminum, or similar machinable materials.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003ePlug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion and dimensional contamination. Before use, verify the gage surface is free of burrs, debris, or oil that could affect measurement accuracy. Store in a protective case away from temperature extremes to maintain calibration. Periodic recalibration against a master standard 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\u003eDiameter of Measurement\u003c\/strong\u003e: 0.842 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.2 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGage Class\u003c\/strong\u003e: ZZ Plus\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 41111600\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: 29-842-2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51691460198706,"sku":"29-842-2","price":16.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d07b361b00e8f796a45697fc17f76934.jpg?v=1788285399","url":"https:\/\/voomisupply.com\/products\/spi-29-842-2-class-zz-plus-plug-gage-0-842-in","provider":"Voomi Supply","version":"1.0","type":"link"}