{"product_id":"starrett-54080-o1-tool-steel-flat-stock-1-4x4x18-in","title":"Starrett 54080 O1 Tool Steel Flat Stock 1\/4x4x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54080 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, punch fabrication, and precision machining applications. Made from AISI Type O1 tool steel, it measures 0.25 inches thick, 4 inches wide, and 18 inches long. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making it suitable for applications where dimensional consistency matters before hardening. Width tolerance runs from 0 to minus 0.005 inches, and length tolerance is plus 0.25 inches, minus 0 inches. The bar weighs approximately 5.1 pounds and is supplied in an annealed condition ready for machining and subsequent oil-quench heat treatment.\u003c\/p\u003e\u003cp\u003eThis flat stock is used in job shops, tool and die operations, and maintenance repair environments where a machineable, hardenable steel blank is needed. Typical applications include jig components, fixture plates, gauges, punches, forming dies, and cutting tools. It is appropriate for both light and moderate stock-removal operations prior to hardening. Machinists and toolmakers working in production or prototype environments will find the close thickness tolerance useful for minimizing secondary grinding operations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel — machines in annealed state, hardens with oil quench\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of plus or minus 0.001 inches for consistent fit in precision assemblies\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.25 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003eSquareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eSupplied as a single flat bar ready for layout, machining, and heat treatment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose O1 tool steel flat stock blank suitable for toolmaking, die making, and precision machining applications requiring an oil-hardening grade steel in the 0.25 inch by 4 inch by 18 inch size.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachining of O1 tool steel flat stock should be performed by qualified machinists or toolmakers familiar with tool steel processing. The bar is supplied in the annealed condition and must be heat treated by a qualified heat treater following oil-quench hardening procedures appropriate for AISI O1 before use in hardened tooling applications. Handle with care to avoid surface damage that could affect tolerance or heat treat results. Always wear appropriate PPE when cutting, grinding, or machining tool steel stock.\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\u003eThickness\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness Tolerance\u003c\/strong\u003e: plus or minus 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: plus 0.250 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSquareness\u003c\/strong\u003e: 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 5.1 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: 54080\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51539024675122,"sku":"54080","price":238.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_a0be04f4-e724-4a40-95fd-3ede828bb63d.jpg?v=1785833167","url":"https:\/\/voomisupply.com\/products\/starrett-54080-o1-tool-steel-flat-stock-1-4x4x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}