{"product_id":"starrett-54075-o1-tool-steel-flat-stock-1-4x1-3-4x18-in","title":"Starrett 54075 O1 Tool Steel Flat Stock 1\/4x1-3\/4x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54075 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 0.25 inches thick, 1.75 inches wide, and 18 inches long, and weighs 2.24 pounds. Thickness tolerance is held to plus or minus 0.001 inches, making it suitable for applications where dimensional consistency is critical before and after heat treatment. Machinists, tool-and-die makers, and metalworking professionals stock O1 flat bar as a versatile raw material for custom tooling and fixture components.\u003c\/p\u003e\u003cp\u003eO1 tool steel flat stock is used across a wide range of precision metalworking environments including job shops, maintenance departments, and production toolrooms. It is well-suited for applications requiring a steel that machines cleanly in the annealed state and responds predictably to oil-quench hardening. Typical uses include punches, dies, gauges, jigs, fixtures, and cutting tools. This bar arrives in the soft-annealed condition, ready for machining prior to heat treatment.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel — machines well in annealed state, hardens with oil quench\u003c\/li\u003e\n\u003cli\u003eThickness held to plus or minus 0.001 inches for consistent pre-grind stock allowance\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to minus 0.005 inches for predictable fit in standard tool slots\u003c\/li\u003e\n\u003cli\u003eLength tolerance of plus 0.250 inches, minus 0 inches — stock arrives at or above nominal length\u003c\/li\u003e\n\u003cli\u003eEdge squareness held to 0.003 inches per inch across all edges\u003c\/li\u003e\n\u003cli\u003eSingle-piece minimum order quantity — suitable for low-volume toolroom use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard AISI O1 oil-hardening tool steel flat bar suitable for general toolmaking, die making, and precision fixture fabrication where oil-quench heat treatment will be applied.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eO1 flat stock is typically processed by tool-and-die makers or machinists using conventional milling, grinding, and sawing equipment. The bar should be machined to near-final dimensions before heat treatment, as post-hardening grinding will be required to achieve final tolerances. Oil-quench hardening should be performed by a qualified heat treater following established protocols for AISI O1 tool steel. Allow the bar to reach a uniform temperature before quenching to minimize distortion.\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: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1.75 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 minus 0.005 inches\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\u003eEdge Squareness\u003c\/strong\u003e: 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.24 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: 54075\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540894515506,"sku":"54075","price":127.11,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_86e6895b-3a4c-40f9-b471-52082f2b058a.jpg?v=1785865588","url":"https:\/\/voomisupply.com\/products\/starrett-54075-o1-tool-steel-flat-stock-1-4x1-3-4x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}