{"product_id":"spi-29-450-4-class-zz-plus-plug-gage-0-45-inch","title":"Spi 29-450-4 Class Zz Plus Plug Gage 0.45 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 29-450-4 is a Class ZZ Plus plug gage designed to inspect and verify hole diameters to a nominal size of 0.45 inches with a tolerance of 0.0002 inches. Plug gages are precision hand tools used in dimensional inspection workflows to confirm that a bored, drilled, or reamed hole meets specified size requirements. The 29-450-4 is constructed from steel, providing the hardness and wear resistance needed for consistent, repeatable measurements in production and shop environments. Machinists, tool-and-die makers, and quality control technicians use Class ZZ Plus gages for general-purpose inspection where tight dimensional verification is required.\u003c\/p\u003e\n\u003cp\u003eThis plug gage is suited for use in machine shops, manufacturing facilities, and quality inspection departments where hole diameter verification is part of routine process control. Class ZZ Plus gages are commonly applied to incoming inspection, in-process checks, and final part verification on drilled or bored components. The 0.45-inch nominal diameter makes it appropriate for applications involving fastener clearance holes, bearing bores, and similar features requiring controlled dimensional tolerances.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNominal diameter of 0.45 inches for precise hole size verification\u003c\/li\u003e\n  \u003cli\u003eTolerance of 0.0002 inches meets Class ZZ Plus accuracy standards\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability and wear resistance in production use\u003c\/li\u003e\n  \u003cli\u003eCompact and lightweight at 0.2 pounds for easy single-hand operation\u003c\/li\u003e\n  \u003cli\u003eSingle-piece package quantity suitable for individual tooling needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose Class ZZ Plus plug gage for verifying 0.45-inch nominal diameter holes in standard machined components and assemblies.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003ePlug gages are used by machinists and quality technicians and require no permanent installation. Handle the gage with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store in a protective case away from other tooling to avoid contact damage to the precision-ground surfaces. Calibrate and inspect the gage periodically per your facility's metrology program to ensure continued accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Diameter\u003c\/strong\u003e: 0.45 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: 29-450-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51699658883378,"sku":"29-450-4","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d523d8f916bf7f250baa2515e8ae7060.jpg?v=1788378823","url":"https:\/\/voomisupply.com\/products\/spi-29-450-4-class-zz-plus-plug-gage-0-45-inch","provider":"Voomi Supply","version":"1.0","type":"link"}