{"product_id":"spi-13-938-6-steel-rule-18-inch-4r-graduation","title":"Spi 13-938-6 Steel Rule 18 Inch 4R Graduation","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 13-938-6 is an 18-inch steel rule designed for precision layout and measurement work in machine shops, fabrication facilities, and general trade applications. Constructed from tool steel with a satin chrome-plated finish, this rule delivers clear, durable graduations across four scales: 1\/16, 1\/32, 1\/64, and 1\/8 inch. At 1-1\/8 inches wide and 0.040 inches thick, it offers a stable, rigid measuring surface suited for scribing lines, checking dimensions, and transferring measurements. Machinists, tool and die makers, sheet metal fabricators, and HVAC technicians who require accurate fractional inch measurements will find this rule a reliable bench and field tool.\u003c\/p\u003e\u003cp\u003eThe 13-938-6 is appropriate for use in residential and commercial trade environments where precise linear measurement is required. Its horizontal scale orientation makes it well suited for standard bench layout work. The included hook adds versatility for quick hookover measurements from a workpiece edge without repositioning the rule. Non-magnetic construction ensures the rule is not affected by contact with magnetized workpieces or tooling.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4R graduation style with four scales: 1\/16, 1\/32, 1\/64, and 1\/8 inch\u003c\/li\u003e\n\u003cli\u003eTool steel construction with satin chrome-plated finish for durability and readability\u003c\/li\u003e\n\u003cli\u003e18-inch overall length provides extended measurement range\u003c\/li\u003e\n\u003cli\u003e1-1\/8-inch width offers a stable measuring surface for layout work\u003c\/li\u003e\n\u003cli\u003eHook included for hookover measurements from workpiece edges\u003c\/li\u003e\n\u003cli\u003eNon-magnetic for use around magnetized tooling and components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard fractional-inch steel rule suitable for general machinist, fabrication, and trade measurement applications requiring 4R graduation in an 18-inch format.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eNo installation is required for this hand tool. Store the rule flat or in a protective sleeve to prevent edge damage and maintain graduation legibility. Avoid contact with abrasive surfaces that could wear the chrome plating and obscure scale markings. Periodic cleaning with a light machine oil cloth will help prevent corrosion on the tool steel substrate.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Tool Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Satin Chrome-Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 1-1\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.0400 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduation Style\u003c\/strong\u003e: 4R\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduations\u003c\/strong\u003e: 1\/16, 1\/32, 1\/64, 1\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScale Orientation\u003c\/strong\u003e: Horizontal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes Hook\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 13-938-6\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51700041089330,"sku":"13-938-6","price":65.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/da58a6f8b3e31a42610297028410ba42.jpg?v=1788385298","url":"https:\/\/voomisupply.com\/products\/spi-13-938-6-steel-rule-18-inch-4r-graduation","provider":"Voomi Supply","version":"1.0","type":"link"}