{"product_id":"starrett-54110-o1-tool-steel-flat-stock-5-16x3-5x18-in","title":"Starrett 54110 O1 Tool Steel Flat Stock 5\/16x3.5x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54110 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, and precision machining applications. It is made from AISI Type O1 tool steel, a versatile oil-hardening grade known for its good dimensional stability during heat treatment and its ability to hold a keen edge after hardening. This bar measures 5\/16 inches thick, 3-1\/2 inches wide, and 18 inches long, and weighs approximately 5.58 pounds. Thickness and squareness tolerances are held to plus or minus 0.001 inches, making this stock suitable for applications where dimensional precision before heat treatment matters. Machinists, tool and die makers, and metalworking shops stock this material for fabricating punches, dies, gauges, and custom tooling.\u003c\/p\u003e\u003cp\u003eThis flat stock is used in machine shops, tool rooms, and fabrication operations that require a reliable general-purpose tool steel in the annealed condition. It is supplied soft and ready to machine, then oil-quenched to harden after final shaping. Typical applications include blanks for punches, dies, cutting tools, arbors, and fixtures where moderate toughness and wear resistance are required. The 18-inch length and 3-1\/2-inch width provide a practical starting blank size for a wide range of tooling projects.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAISI Type O1 oil-hardening tool steel in the annealed, machinable condition\u003c\/li\u003e\n\u003cli\u003eThickness of 5\/16 inches with plus or minus 0.001 inches thickness tolerance\u003c\/li\u003e\n\u003cli\u003eWidth of 3-1\/2 inches with a width tolerance of 0.000 to minus 0.005 inches\u003c\/li\u003e\n\u003cli\u003eLength of 18 inches with a length tolerance of plus 0.250 inches\u003c\/li\u003e\n\u003cli\u003eSquareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eWeighs 5.58 pounds per bar\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose O1 oil-hardening tool steel flat stock suitable for toolmaking, die making, and precision machining applications requiring annealed stock that can be machined and then oil-quenched to final hardness.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMachining and heat treatment of tool steel should be performed by qualified machinists or tool and die makers familiar with O1 grade steel. Always anneal or stress-relieve the stock as needed before rough machining, and follow the steel manufacturer's recommended heat treatment parameters for hardening and tempering. Cutting operations should use appropriate speeds and feeds for tool steel. Wear appropriate PPE when handling, cutting, or heat-treating 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: 5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 3-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\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\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: 5.58 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: 54110\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542646817074,"sku":"54110","price":252.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_4c864360-3cb2-4fae-8eb2-5d18920533e7.jpg?v=1785904126","url":"https:\/\/voomisupply.com\/products\/starrett-54110-o1-tool-steel-flat-stock-5-16x3-5x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}