{"product_id":"starrett-54525-o1-tool-steel-flat-stock-1-1-4x5x36-in","title":"Starrett 54525 O1 Tool Steel Flat Stock 1-1\/4x5x36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54525 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, jig fabrication, and precision machining applications. Manufactured to AISI Type O1 specifications, this flat stock measures 1-1\/4 inches thick, 5 inches wide, and 36 inches long, and ships in a ready-to-machine condition before hardening. Thickness tolerance is held to plus or minus 0.001 inches, making this stock suitable for applications where dimensional consistency prior to heat treatment is critical. Machinists, tool and die makers, and metal fabricators rely on O1 flat stock for its predictable oil-quench hardening response and good wear resistance after heat treatment.\u003c\/p\u003e\u003cp\u003eO1 oil-hardening tool steel flat stock is used in both job shop and production toolroom environments. Typical applications include punches, dies, gauges, blades, and custom tooling components. This bar is supplied in an annealed condition, allowing conventional machining before the heat-treat cycle. The 36-inch length is a standard toolroom size that accommodates most bench and mill setups without requiring additional material removal for rough stock preparation.\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 held to plus or minus 0.001 inches for consistent pre-hardening machining\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 0.015 inches over nominal\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eSupplied in annealed condition — ready for machining prior to heat treatment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard AISI O1 oil-hardening tool steel flat stock suitable for general toolroom, die making, and precision fabrication applications requiring pre-hardened stock preparation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCutting and machining of tool steel flat stock should be performed with appropriate carbide or high-speed steel tooling rated for tool steel. Secure the workpiece firmly before sawing or milling to maintain dimensional accuracy and operator safety. Heat treatment — including austenitizing, oil quenching, and tempering — should be performed by qualified personnel following established metallurgical procedures for AISI O1 steel. Always wear appropriate PPE when handling, cutting, or heat-treating 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: 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 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\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: 63.75 pounds\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: 54525\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541569143090,"sku":"54525","price":1755.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_fa63ed6a-9def-4cf3-8838-8f3bbf45066a.jpg?v=1785879399","url":"https:\/\/voomisupply.com\/products\/starrett-54525-o1-tool-steel-flat-stock-1-1-4x5x36-in","provider":"Voomi Supply","version":"1.0","type":"link"}