{"product_id":"spi-29-309-2-class-zz-plus-plug-gage-0-309-in","title":"Spi 29-309-2 Class Zz Plus Plug Gage 0.309 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 29-309-2 is a Class ZZ Plus plug gage used to verify the diameter of machined holes to a precise tolerance of 0.0002 inches. Manufactured from steel, this go\/no-go style gage is a standard tool in quality control, inspection, and production environments where hole size must be confirmed to tight specifications. At 0.309 inches in diameter, the 29-309-2 is suited for small-bore inspection tasks common in machine shops, tool rooms, and light manufacturing facilities. Machinists, quality inspectors, and tooling technicians rely on plug gages like this to confirm dimensional conformance without requiring complex measurement setups.\u003c\/p\u003e\n\u003cp\u003eThis plug gage is used in applications where hole diameter verification is required at or near 0.309 inches. Typical use cases include incoming inspection of drilled or reamed holes, in-process checks on machined components, and final inspection before assembly. Class ZZ Plus tolerance rating makes it appropriate for general-purpose inspection work where high production volumes call for fast, repeatable go\/no-go checks rather than variable measurement instruments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0.309 inch nominal diameter for small-bore hole inspection\u003c\/li\u003e\n  \u003cli\u003eClass ZZ Plus tolerance rating at 0.0002 inches for general-purpose inspection\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability in production and tool room environments\u003c\/li\u003e\n  \u003cli\u003eCompact and lightweight at 0.2 pounds for easy handling during inspection\u003c\/li\u003e\n  \u003cli\u003eSingle-piece package quantity suitable for individual technician use\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 general-purpose inspection of holes with a nominal diameter of 0.309 inches in standard machining and quality control applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003ePlug gages are handled and used by machinists, quality inspectors, and metrology technicians. Store the gage in a clean, dry environment and handle it with clean hands or lint-free gloves to prevent corrosion and contamination that can affect accuracy. Do not force the gage into a hole; apply only light, consistent hand pressure to avoid wear on the gage or damage to the part being inspected. Periodically check the gage itself against a calibration standard to confirm it remains within tolerance.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter of Measurement\u003c\/strong\u003e: 0.309 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\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: 29-309-2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51690541482290,"sku":"29-309-2","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/91f6433689abf34cdfee1e0a7eb12c0f.jpg?v=1788271320","url":"https:\/\/voomisupply.com\/products\/spi-29-309-2-class-zz-plus-plug-gage-0-309-in","provider":"Voomi Supply","version":"1.0","type":"link"}