{"product_id":"starrett-54190-o1-tool-steel-flat-stock-0-75x1-5x18-in","title":"Starrett 54190 O1 Tool Steel Flat Stock 0.75x1.5x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54190 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. Manufactured from AISI Type O1 tool steel, this flat stock measures 0.75 inches thick, 1.5 inches wide, and 18 inches long, with a finished weight of 5.74 pounds. Thickness tolerance is held to plus or minus 0.001 inches, and squareness is controlled to 0.003 inches per inch on all edges. O1 tool steel offers good machinability in the annealed state and responds well to oil-quench hardening, making it a reliable choice for custom tooling, punches, gauges, and fixture components.\u003c\/p\u003e\u003cp\u003eThis flat stock is suited for job shops, tool and die operations, and maintenance departments that need a standard-size blank for machining, grinding, or hardening to a finished tool. The 18-inch length provides enough stock for multiple short tooling blanks or a single longer component. The controlled width and thickness tolerances reduce the amount of finish grinding required before use, saving setup time on the surface grinder or milling machine. Machinists and toolmakers working on tight-tolerance fixtures or cutting tools will find this a practical starting blank.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel construction for consistent heat treat response\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for reduced finish grinding\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to 0.005 inches under nominal\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness controlled to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eSingle-piece packaging — no multi-bar minimum required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 tool steel flat stock blank suitable for general toolmaking, die making, punch fabrication, and precision fixture work where oil-hardening tool steel stock is specified.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachining and grinding of O1 tool steel should be performed with appropriate cutting fluids to control heat and preserve the annealed condition before hardening. Oil-quench hardening and tempering should be carried out by a qualified toolmaker or heat treater following established metallurgical procedures. Always wear appropriate PPE when cutting, grinding, or heat treating tool steel stock. Consult applicable shop safety standards when operating surface grinders, mills, or heat treat 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\u003eThickness\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1.5 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 0.005 inches under nominal\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: 5.74 pounds\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: STARRETT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 54190\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541373747506,"sku":"54190","price":263.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_e0c62e2f-aeac-4da7-abbe-f800f11c2b07.jpg?v=1785873958","url":"https:\/\/voomisupply.com\/products\/starrett-54190-o1-tool-steel-flat-stock-0-75x1-5x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}