{"product_id":"starrett-57056-o1-tool-steel-flat-stock-1x1-5x18-in","title":"Starrett 57056 O1 Tool Steel Flat Stock 1x1.5x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 57056 is an O1 oil-hardening tool steel flat bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 1 inch thick, 1.5 inches wide, and 18 inches long, with a shipping weight of 7.65 pounds. Thickness and width tolerances are held to +0.0100 to +0.0150 inches, and length tolerance is +0.2500 inches. Edge squareness is controlled to 0.003 inches per inch across all edges. O1 tool steel responds well to oil quench hardening, making it a practical choice for fabricating punches, dies, gauges, and cutting tools that require a reliable hardened working surface.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for machine shops, toolrooms, and fabrication environments where close-tolerance raw material is needed before heat treatment. Machinists and tool-and-die makers typically rough-cut and profile this stock prior to hardening. The 18-inch bar length provides practical workpiece sizing for most bench and mill operations. Its AISI O1 designation means it is compatible with standard oil-quench hardening procedures common in industrial toolroom practice.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for reliable hardness response after heat treatment\u003c\/li\u003e\n\u003cli\u003eThickness: 1 inch with +0.0100 to +0.0150 inch tolerance\u003c\/li\u003e\n\u003cli\u003eWidth: 1.5 inches with +0.0100 to +0.0150 inch tolerance\u003c\/li\u003e\n\u003cli\u003eLength: 18 inches with +0.2500 inch tolerance\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eReady for machining, profiling, and heat treatment in toolroom applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard AISI Type O1 oil-hardening tool steel flat bar suitable for general toolroom, die making, and precision machining stock applications where oil-quench hardening is required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachining and cutting of this stock should be performed prior to the hardening process. Qualified machinists and tool-and-die makers should handle all profiling, drilling, and finishing operations before oil quench. Follow applicable shop safety procedures and equipment manufacturer guidelines when operating mills, saws, and grinders on tool steel. Heat treatment should be carried out by personnel familiar with AISI O1 oil-hardening procedures using properly calibrated furnace equipment.\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\u003eMaterial Specification\u003c\/strong\u003e: AISI Type O1 Oil Hardening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Thickness\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 1.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: +0.0100 to +0.0150 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: +0.0100 to +0.0150 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: +0.2500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Squareness\u003c\/strong\u003e: 0.003 inches per inch, all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 7.65 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: STARRETT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 57056\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51544464163122,"sku":"57056","price":411.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_6322ec0f-611e-43d5-a454-bc90b4514dc8.jpg?v=1785927214","url":"https:\/\/voomisupply.com\/products\/starrett-57056-o1-tool-steel-flat-stock-1x1-5x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}