{"product_id":"spi-29-772-1-class-zz-plus-plug-gage-0-772-inch","title":"Spi 29-772-1 Class Zz Plus Plug Gage 0.772 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 29-772-1 is a Class ZZ Plus plug gage designed to verify the inside diameter of bores, holes, and machined features to a precise measurement standard. Built from steel, this go\/no-go style inspection tool checks that a hole diameter meets the specified 0.772 inch dimension within a tolerance of 0.0002 inches. Machinists, quality control technicians, and tool-room professionals use plug gages like the 29-772-1 to confirm dimensional conformance during production runs and incoming inspection processes.\u003c\/p\u003e\n\u003cp\u003eThis plug gage is suited for inspection work in machine shops, manufacturing facilities, and tool rooms where tight-tolerance hole verification is required. It is appropriate for use on drilled, reamed, bored, or honed features in metal, plastic, or composite workpieces. The Class ZZ Plus designation indicates a specific gage tolerance grade appropriate for general-purpose inspection of commercial-grade machined parts.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNominal measurement diameter of 0.772 inches for direct hole size verification\u003c\/li\u003e\n  \u003cli\u003eClass ZZ Plus tolerance grade suited for general-purpose dimensional inspection\u003c\/li\u003e\n  \u003cli\u003eGage tolerance of 0.0002 inches ensures reliable pass\/fail determination\u003c\/li\u003e\n  \u003cli\u003eSteel construction provides durability and wear resistance in production environments\u003c\/li\u003e\n  \u003cli\u003eCompact size supports handheld use without additional fixtures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose plug gage for inspecting 0.772 inch nominal diameter bores and through-holes in machined components across standard manufacturing and quality control applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003ePlug gages are handled by quality control technicians and machinists and require no installation in the traditional sense. Store the gage in its protective case when not in use to prevent wear or damage to the precision ground surface. Clean the gage and the bore being checked before measurement to avoid false readings from chips or debris. Periodic calibration against certified masters is recommended to maintain measurement traceability.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter of Measurement\u003c\/strong\u003e: 0.772 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTolerance\u003c\/strong\u003e: 0.0002 inches\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: 29-772-1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":67950434550066,"sku":"29-772-1","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5f32656ea9f2742d45aed1a48f550e30_c6fa10c5-ae7f-4eb9-acb3-1ba7ed39f151.jpg?v=1791717668","url":"https:\/\/voomisupply.com\/products\/spi-29-772-1-class-zz-plus-plug-gage-0-772-inch","provider":"Voomi Supply","version":"1.0","type":"link"}