{"product_id":"spi-19-646-9-class-zz-minus-plug-pin-gage-0-646-in","title":"Spi 19-646-9 Class Zz Minus Plug Pin Gage 0.646 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 19-646-9 is a Class ZZ minus plug pin gage machined from steel, used to verify bore and hole diameters in precision inspection and quality control applications. It is manufactured to a minus tolerance of 0.0002 inches, meaning the actual diameter is held below the nominal 0.646-inch dimension within that tolerance band. Class ZZ gages are the most common grade used for general-purpose inspection of production parts. Machinists, toolmakers, and quality technicians reach for pin gages when checking drilled, reamed, or bored holes to a known go or no-go standard.\u003c\/p\u003e\n\u003cp\u003eThis gage is suited for use in machine shops, fabrication facilities, and inspection rooms where hole diameter verification is part of standard in-process or final inspection. It fits into standard pin gage sets and handles, making it easy to incorporate into an existing gage collection. The 0.646-inch nominal diameter covers a size commonly encountered in mechanical assembly and fixture work. It is appropriate for both bench inspection and floor-level production checks.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eClass ZZ tolerance grade for general-purpose production inspection\u003c\/li\u003e\n  \u003cli\u003eMinus tolerance of 0.0002 inches holds the gage below nominal for go-gage applications\u003c\/li\u003e\n  \u003cli\u003e0.646-inch nominal diameter in hardened steel construction\u003c\/li\u003e\n  \u003cli\u003eLightweight at 0.2 pounds, suitable for handheld use\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard pin gage handles and sets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct addition to standard Class ZZ pin gage sets and handles accepting 0.646-inch diameter gage pins.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003ePin gages should be handled with clean, dry hands or inspection gloves to prevent corrosion from skin oils. Before use, verify the gage and workpiece bore are at a stable temperature, ideally 68 degrees F, to avoid thermal expansion errors. Insert the gage gently into the hole being checked without forcing or rotating under pressure, which can cause premature wear. Store the gage in a protective case away from other tools to preserve the ground surface finish.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Diameter\u003c\/strong\u003e: 0.646 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance\u003c\/strong\u003e: 0.0002 inches (minus)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance (mm)\u003c\/strong\u003e: 0.0002 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGage Class\u003c\/strong\u003e: ZZ\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\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: 19-646-9\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51705817497906,"sku":"19-646-9","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3ed7f367f9428b7a167c36acdc7f7fe7.jpg?v=1788431309","url":"https:\/\/voomisupply.com\/products\/spi-19-646-9-class-zz-minus-plug-pin-gage-0-646-in","provider":"Voomi Supply","version":"1.0","type":"link"}