{"product_id":"spi-29-442-1-class-zz-plus-plug-gage-0-442-in","title":"Spi 29-442-1 Class Zz Plus Plug Gage 0.442 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 29-442-1 is a Class ZZ Plus plug gage used to verify the inside diameter of bored, drilled, or reamed holes to a nominal size of 0.442 inches. Built from steel, this gage delivers a tolerance of 0.0002 inches, making it a reliable go-to tool for dimensional inspection on the shop floor or in a quality-control environment. Machinists, toolmakers, and QC inspectors use plug gages like this one to confirm whether a finished hole meets print specifications without the need for a measuring instrument readout.\u003c\/p\u003e\n\u003cp\u003eClass ZZ Plus plug gages are typically used in production inspection settings where moderate accuracy is required. This gage is suited for checking holes in metal or plastic workpieces where the nominal diameter is 0.442 inches. It is a single-end gage intended for pass or fail verification. Typical applications include incoming inspection, in-process checks on CNC or manual machining operations, and final inspection before part acceptance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNominal measurement diameter of 0.442 inches for precise hole verification\u003c\/li\u003e\n  \u003cli\u003eClass ZZ Plus tolerance of 0.0002 inches for consistent pass\/fail inspection\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability in production and inspection environments\u003c\/li\u003e\n  \u003cli\u003eCompact and lightweight at 0.2 pounds for easy single-hand use\u003c\/li\u003e\n  \u003cli\u003eSingle-unit packaging suitable for individual bench or field use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style inspection tool for use wherever a 0.442-inch nominal diameter plug gage is specified by print or quality plan.\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 from skin oils. Before use, verify the gage is clean and free of burrs or debris that could affect the reading. Do not force the gage into a hole; if it does not enter under light hand pressure, the hole is undersize. Store the gage in its case or a protected location to maintain calibration integrity.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasurement Diameter\u003c\/strong\u003e: 0.442 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance\u003c\/strong\u003e: 0.0002 inches (0.0002 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGage Class\u003c\/strong\u003e: ZZ Plus\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: 29-442-1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51709042229554,"sku":"29-442-1","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bcfd699ff7374ddaf72333559fc0ccc6.jpg?v=1788450404","url":"https:\/\/voomisupply.com\/products\/spi-29-442-1-class-zz-plus-plug-gage-0-442-in","provider":"Voomi Supply","version":"1.0","type":"link"}