{"product_id":"starrett-54112-o1-tool-steel-flat-stock-5-16x4-1-2x18-in","title":"Starrett 54112 O1 Tool Steel Flat Stock 5\/16x4-1\/2x18 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 54112 is an O1 oil-hardening tool steel flat stock bar used in toolmaking, die work, jig fabrication, and precision machining applications. Made from AISI Type O1 oil-hardening tool steel, this flat stock measures 5\/16 inches thick, 4-1\/2 inches wide, and 18 inches long, and weighs 7.18 pounds. The thickness and squareness tolerances are held to +\/- 0.001 inches, making this stock suitable for applications where dimensional accuracy matters before and after heat treatment. Machinists and tool-and-die makers rely on O1 flat stock when they need a material that machines cleanly in the annealed state and responds predictably to oil-quench hardening.\u003c\/p\u003e\u003cp\u003eThis flat stock is used in general toolroom and industrial manufacturing environments. Typical applications include blanks for punches, dies, gauges, jigs, fixtures, and cutting tools. The 18-inch length provides sufficient material for most single-piece toolroom blanks or can be cut down for multiple smaller components. The 4-1\/2-inch width supports wide die or fixture plate applications without requiring a weld or laminate. This stock is supplied in the 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 and hardens predictably with oil quench\u003c\/li\u003e\n\u003cli\u003eThickness tolerance of +\/- 0.001 inches for consistent dimensional accuracy\u003c\/li\u003e\n\u003cli\u003eWidth tolerance of 0.000 to -0.005 inches for close-tolerance stock removal planning\u003c\/li\u003e\n\u003cli\u003eLength tolerance of +0.250 inches provides usable overstock for facing or squaring operations\u003c\/li\u003e\n\u003cli\u003eSquareness held to 0.003 inches per inch on all edges\u003c\/li\u003e\n\u003cli\u003eSingle-piece packaging with a minimum order quantity of 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard O1 oil-hardening tool steel flat stock suitable for general toolroom machining, die making, and fixture fabrication where AISI Type O1 material specification is required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eO1 tool steel flat stock is worked by machinists and tool-and-die makers using conventional milling, grinding, and sawing equipment. Material should be machined to near-final dimensions in the annealed state before heat treatment. Oil-quench hardening and tempering should be performed by a qualified heat treater following AISI O1 recommended thermal cycles. Always use appropriate personal protective equipment when cutting or grinding tool steel.\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: 4-1\/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: +\/- 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Tolerance\u003c\/strong\u003e: 0.000 to -0.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Tolerance\u003c\/strong\u003e: +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: 7.18 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 54112\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540903362866,"sku":"54112","price":310.73,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6555d28ffd7e02d6cc316d25961d7428_3ad20a49-5505-48f8-b538-f41aaca74817.jpg?v=1785865685","url":"https:\/\/voomisupply.com\/products\/starrett-54112-o1-tool-steel-flat-stock-5-16x4-1-2x18-in","provider":"Voomi Supply","version":"1.0","type":"link"}