{"product_id":"starrett-54213-o1-tool-steel-flat-stock-1x1-5x18-in","title":"Starrett 54213 O1 Tool Steel Flat Stock 1x1.5x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54213 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, punch fabrication, and precision machining applications. It is produced to AISI Type O1 material specification, a widely used oil-hardening tool steel known for its dimensional stability during heat treatment. This bar measures 1 inch thick, 1-1\/2 inches wide, and 18 inches long, with a weight of 7.65 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications that require close stock-to-finish allowances. Machinists and toolmakers typically stock this material for custom tooling, fixtures, gauges, and forming dies.\u003c\/p\u003e\u003cp\u003eThis flat stock is intended for use in tool and die shops, machine shops, and maintenance departments requiring pre-cut O1 tool steel in a ready-to-machine condition. It arrives in the annealed state, allowing conventional machining before hardening. The 18-inch length provides a practical starting size for individual tool blanks, small die components, or gauge stock. It is sold in single-piece quantities with a minimum order quantity of one.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel construction for predictable hardening response\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for close dimensional control\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches for consistent stock sizing\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches, zero minus\u003c\/li\u003e\n\u003cli\u003eEdge squareness: all edges held to 0.003 inches per inch\u003c\/li\u003e\n\u003cli\u003eSingle-piece packaging, no minimum multi-piece commitment required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as standard O1 oil-hardening tool steel flat stock suitable for toolmaking, die work, gauge fabrication, and general precision machining wherever AISI O1 material specification is required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis material is supplied in the annealed condition and should be machined using tooling rated for tool steel stock. Heat treatment — including oil quench hardening and tempering — should be performed by qualified personnel following established heat-treat procedures appropriate for AISI O1 steel. Use proper machine guarding and workholding during sawing, milling, or grinding operations. Allow material to reach ambient temperature before final inspection measurements are taken.\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: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 7.65 pounds\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, zero minus\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\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: 54213\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540251050290,"sku":"54213","price":326.16,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_0627b0d9-910c-4768-9d7c-47c045581a03.jpg?v=1785850268","url":"https:\/\/voomisupply.com\/products\/starrett-54213-o1-tool-steel-flat-stock-1x1-5x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}