{"product_id":"spi-13-203-5-steel-parallel-6x1-1-8x1-2-inch-matched-pair","title":"Spi 13-203-5 Steel Parallel 6x1-1\/8x1\/2 Inch Matched Pair","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 13-203-5 is a high-grade hardened steel parallel used to support and level workpieces during machining, grinding, and inspection operations. Measuring 6 inches long by 1-1\/8 inches high by 1\/2 inch thick, this parallel is precision ground on all four faces to a parallelism tolerance of 0.0003 inches and a squareness tolerance of 0.0005 inches. Hardened to 50 Rc for wear resistance, it maintains dimensional accuracy under repeated use. It is sold as a matched pair, making it suitable for applications requiring two identical reference surfaces.\u003c\/p\u003e\n\u003cp\u003eThis parallel is used in machine shops, tool rooms, and metrology environments. Typical applications include supporting workpieces in milling vises, setting up grinding fixtures, and establishing reference planes during layout and inspection. The four precision-ground faces provide multiple orientation options, allowing the parallel to be repositioned to different heights within a setup. Machinists, tool and die makers, and quality control technicians routinely use parallels of this type in both production and maintenance settings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFour precision-ground faces for multiple setup orientations\u003c\/li\u003e\n  \u003cli\u003eParallelism tolerance of 0.0003 inches for repeatable accuracy\u003c\/li\u003e\n  \u003cli\u003eSquareness tolerance of 0.0005 inches\u003c\/li\u003e\n  \u003cli\u003eHigh-grade hardened steel at 50 Rc for long-term durability\u003c\/li\u003e\n  \u003cli\u003eSold as a matched pair for symmetric workholding setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard precision parallel for use with milling vises, surface grinders, and inspection fixtures in general machining and toolroom applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eParallels should be cleaned and inspected for burrs or nicks before each use to ensure accurate seating. Place the parallel on a clean, flat reference surface or directly in a vise jaw, then seat the workpiece firmly against it. Avoid using parallels as pry tools or striking surfaces, as this can damage the ground faces and compromise tolerance. Periodic inspection against a calibrated reference surface is recommended to verify continued accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 1-1\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 1\/2 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParallelism\u003c\/strong\u003e: 0.0003 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Precision-Ground Sides\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 50 Rc\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSold As\u003c\/strong\u003e: Matched Pair\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: 13-203-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51698586976562,"sku":"13-203-5","price":76.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2053fe91b7cccaca938cfceb8466db64.jpg?v=1788365097","url":"https:\/\/voomisupply.com\/products\/spi-13-203-5-steel-parallel-6x1-1-8x1-2-inch-matched-pair","provider":"Voomi Supply","version":"1.0","type":"link"}