{"product_id":"starrett-54308-o1-tool-steel-flat-stock-1-8-x-3-1-2-x-36-in","title":"Starrett 54308 O1 Tool Steel Flat Stock 1\/8 X 3-1\/2 X 36 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 54308 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die making, and precision machining applications. Manufactured to AISI Type O1 specification, this flat stock holds tight dimensional tolerances straight from stock, making it suitable for blanks, jigs, fixtures, and custom tooling components. The bar measures 0.125 inches thick, 3.5 inches wide, and 36 inches long and weighs 4.47 pounds. Thickness tolerance is plus or minus 0.001 inches, providing consistent stock removal and predictable heat-treat response across the full length.\u003c\/p\u003e\n\u003cp\u003eThis flat stock is intended for machinists, tool and die makers, and fabricators working in job shop, production, and maintenance-repair environments. O1 tool steel is a general-purpose oil-hardening grade well suited for punches, dies, gauges, and cutting tools where moderate wear resistance and good machinability in the annealed state are required. The 36-inch length allows multiple blanks to be cut from a single piece, reducing waste in short-run tooling work. It ships in the annealed condition and is ready for machining prior to heat treatment.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAISI Type O1 oil-hardening tool steel — annealed condition, ready to machine\u003c\/li\u003e\n  \u003cli\u003eThickness tolerance of plus or minus 0.001 inches for consistent stock removal\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 held to 0.003 inches per inch on all edges\u003c\/li\u003e\n  \u003cli\u003eSingle-piece packaging suitable for low-volume toolroom procurement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard annealed O1 tool steel flat bar for general toolroom and die shop applications requiring oil-hardening grade material in a 0.125-inch by 3.5-inch cross section.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCutting and machining of tool steel flat stock should be performed with appropriate metal-cutting equipment such as a band saw, mill, or surface grinder; wear appropriate PPE including eye protection and cut-resistant gloves. Heat treatment to final hardness should be performed by a qualified heat treater or toolroom professional following recognized procedures for AISI O1 tool steel. Always allow the workpiece to reach ambient temperature before taking final dimensional measurements. Hardened tool steel components should be handled with care to avoid edge chipping prior to any draw or tempering operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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: 0.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3.5 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: 4.47 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31231200\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 54308\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542707962162,"sku":"54308","price":207.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_7fe877ae-eddb-4b5e-87c9-03f5ae290577.jpg?v=1785904964","url":"https:\/\/voomisupply.com\/products\/starrett-54308-o1-tool-steel-flat-stock-1-8-x-3-1-2-x-36-in","provider":"Voomi Supply","version":"1.0","type":"link"}