{"product_id":"spi-29-515-4-class-zz-plus-plug-gage-0-515-in","title":"Spi 29-515-4 Class Zz Plus Plug Gage 0.515 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 29-515-4 is a Class ZZ Plus plug gage designed to verify the inside diameter of bored, drilled, or reamed holes to a nominal size of 0.515 inches. Built from steel, this go\/no-go style inspection tool provides a tolerance of 0.0002 inches, making it suitable for precision quality-control work in machine shops, manufacturing facilities, and general metalworking environments. Machinists, tool-and-die technicians, and quality inspectors use plug gages like this one to confirm that finished holes fall within specified limits before parts advance to the next stage of production. The compact form factor and single-piece construction keep handling straightforward during high-volume inspection routines.\u003c\/p\u003e\n\u003cp\u003eThis gage is used in applications where hole diameter verification is required on ferrous and non-ferrous workpieces. Typical settings include job shops performing close-tolerance work, production lines running acceptance sampling, and inspection departments validating incoming or in-process parts. Class ZZ Plus gages are generally applied where commercial-grade tolerances are acceptable rather than the tighter limits demanded by Class X or Class Y tooling. The 0.515-inch nominal size addresses a common fractional and close-to-fractional bore range found in a wide range of mechanical assemblies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0.515-inch nominal diameter for precise hole inspection\u003c\/li\u003e\n  \u003cli\u003eClass ZZ Plus tolerance classification suitable for commercial-grade inspection work\u003c\/li\u003e\n  \u003cli\u003e0.0002-inch tolerance for reliable go\/no-go acceptance decisions\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability in shop-floor environments\u003c\/li\u003e\n  \u003cli\u003eCompact single-piece design simplifies handling during repetitive inspection tasks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style inspection tool for verifying 0.515-inch nominal inside diameters in standard mechanical inspection 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. Clean and lightly oil the gage before and after each use to prevent corrosion and ensure accurate readings. Never force the gage into a hole; entry should be smooth with light hand pressure only. Store in a protective case away from temperature extremes to maintain dimensional stability.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter of Measurement\u003c\/strong\u003e: 0.515 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance (mm)\u003c\/strong\u003e: 0.0002 mm\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: 29-515-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51690739171634,"sku":"29-515-4","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e089f8a8b16de36a7fd3afbeea52d65b.jpg?v=1788274719","url":"https:\/\/voomisupply.com\/products\/spi-29-515-4-class-zz-plus-plug-gage-0-515-in","provider":"Voomi Supply","version":"1.0","type":"link"}