{"product_id":"starrett-54448-o1-tool-steel-flat-stock-0-5x4-5x36-in","title":"Starrett 54448 O1 Tool Steel Flat Stock 0.5x4.5x36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54448 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock measures 0.5 inches thick, 4.5 inches wide, and 36 inches long, weighing 22.95 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications where dimensional accuracy before hardening is critical. The O1 grade oil-hardens at relatively low quench temperatures, offering good dimensional stability during heat treatment and excellent machinability in the annealed state.\u003c\/p\u003e\u003cp\u003eThis flat stock is used in machine shops, tool rooms, and fabrication shops for producing punches, dies, gauges, cutting tools, and fixture components. It is supplied in the annealed condition, ready for machining prior to hardening. Machinists, toolmakers, and die makers working in both job shop and production environments typically work with this material. Its 36-inch length provides enough stock for multiple blanks depending on the finished part size.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel for predictable heat treat response\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for close-tolerance blanks\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.015 inches, minus 0 inches\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003eEdge squareness: all edges held to 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003eSupplied in annealed condition for ease of machining\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 oil-hardening flat stock bar suitable for general toolroom and die-making applications requiring AISI Type O1 material in 0.5 inch by 4.5 inch cross-section.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis material is machined prior to hardening by a qualified toolmaker or machinist. Follow appropriate shop safety procedures when cutting, grinding, or milling tool steel. Heat treatment should be performed by personnel familiar with AISI O1 specifications and applicable quench procedures. Wear appropriate PPE when handling bar stock of this size and weight.\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: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 36 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 0.015 inches, minus 0 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: 22.95 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: 54448\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540506313010,"sku":"54448","price":528.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_af3edad6-9bd9-499c-b7cc-3ead5c3b6a7a.jpg?v=1785856882","url":"https:\/\/voomisupply.com\/products\/starrett-54448-o1-tool-steel-flat-stock-0-5x4-5x36-in","provider":"Voomi Supply","version":"1.0","type":"link"}