{"product_id":"starrett-57059-o1-tool-steel-flat-stock-1x3x18-in","title":"Starrett 57059 O1 Tool Steel Flat Stock 1x3x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 57059 is an O1 oil-hardening tool steel flat stock bar used in precision toolmaking, die making, jig fabrication, and general machine shop work. Measuring 1 inch thick, 3 inches wide, and 18 inches long, this flat stock is manufactured to AISI Type O1 specification, a general-purpose oil-hardening tool steel known for its dimensional stability during heat treatment. Thickness and width tolerances are held to +0.0100 to 0.0150 inches, and length tolerance is +0.2500 inches. Squareness is controlled to 0.003 inches per inch on all edges, making this stock suitable for precision layout and machining operations before hardening.\u003c\/p\u003e\u003cp\u003eO1 tool steel flat stock at this size is commonly used in tool and die shops, maintenance and repair operations, and prototype fabrication environments. It is well suited for applications requiring a blank that will be machined, ground, or EDM-cut to final form and then oil-quench hardened. Machinists and tool makers working in both job shop and production environments select this size for punch blanks, wear plates, gauges, and small die components where close-tolerance annealed stock is required prior to heat treat.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel material specification\u003c\/li\u003e\n\u003cli\u003eThickness and width tolerances of +0.0100 to +0.0150 inches for predictable stock removal during machining\u003c\/li\u003e\n\u003cli\u003eLength tolerance of +0.2500 inches provides sufficient extra material for facing operations\u003c\/li\u003e\n\u003cli\u003eSquareness controlled to 0.003 inches per inch on all edges for accurate layout reference\u003c\/li\u003e\n\u003cli\u003eAnnealed condition allows machining before oil-quench hardening\u003c\/li\u003e\n\u003cli\u003eSingle-piece package quantity supports low-volume tool room and prototype applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard AISI O1 oil-hardening flat stock blank for use in tool and die, jig and fixture, and general precision machining applications where pre-hardened or anneal-and-harden workflow is required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMaterial handling and cutting should be performed by qualified machinists or tool makers using appropriate metalworking equipment. Always wear appropriate PPE when cutting, grinding, or heat-treating tool steel. Heat treatment, including annealing, hardening, and tempering, should follow AISI O1 guidelines and should be performed by personnel familiar with tool steel metallurgy. Secure stock properly in a vise or fixture before any cutting or grinding operation to prevent movement.\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: 3 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\u003eSquareness\u003c\/strong\u003e: 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 15.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\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: 57059\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51698075304242,"sku":"57059","price":519.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_94eb588b-7845-4693-9c60-d1337718b97f.jpg?v=1788357386","url":"https:\/\/voomisupply.com\/products\/starrett-57059-o1-tool-steel-flat-stock-1x3x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}